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DMx Verifier+ User`s Manual

1. File Nominal Cell Size 15 0 Center Offset A 0 0 15 30 0 gt 30z 0 Size Offset 0 0 15 30z 20 302 2 0 Cell Modulation On 100zz Off 100 Border Match A 100 Symbol Contrast 100 Axial Nonuniformity 4 0 00 Print Growth A X0 Y 0 Unused Error Correction amp 1 00 Angle of Distortion 4 0 0 Overall Grade DPM Status Good Data Matrix Verifier Correlation Score Test Only enabled parameters have grade displayed proceeding the measurement values The following information explains the various fields in the DMx Data window e Nominal Cell Size is 15 pixels and was not enabled for grading To obtain good measurement results a minimum of 5 pixels is required We recommend that the camera s FOV be set such that the nominal cell size is at least 10 pixels e Center Offset is 0 0 and has the grade A This value alone tells that there is no cell center misplacement problem Additionally there are no cells that have placement errors between 1596 and 3096 or more than 3046 of the nominal cell size e Size Offset is 0 0 and has the grade A This value alone tells that there is no cell size offset problem Additionally there are no cells that have size errors between 15 and 30 or more than 30 of the average cell area 8o Cell Modulation is 100 for On and Off cells respectively and has the grade A This score shows that all On cells have the same grayscale value and all Off cells have the same gray
2. Data Matrix Encodation Schemes This section describes ECC 000 140 and ECC 200 ECC 000 140 The data is encoded using one of six encodation schemes format strings The encodation scheme is fixed for the entire symbol As a result the selection of the most appropriate encodation scheme allows you to compress the symbol to its smallest form without wasting space on characters not used Table A 2 lists the six encodation schemes and their outputs A 6 DMx Verifier User Manual V2 1 0 Feb 2009 Data Matrix Encodation Schemes TABLE A 2 Encodation Schemes Format Strings Encodation Bits per Data Scheme Format Outputs and Description Character Format 1 500 numeric characters 0 9 with spaces 3 5 Format 2 500 uppercase alphabetic characters with 4 8 spaces and punctuation Format 3 500 uppercase alphanumeric characters 5 25 with spaces commas periods slashes and minuses Format 4 500 uppercase alphanumeric characters 5 5 with spaces Format 5 500 characters with full 7 bit ASCII 7 keyboard Format 6 500 characters with full 8 bit ISO for 8 international languages A ECC 200 The data may be encoded using any combination of six encodation schemes listed in Table A 3 kaia TABLE A 3 Encodation Schemes File Formats e P So Encodation Bits per Data on Scheme Characters Character 3 E ASCII Double digit numeric ASCII values 0 127 4 ao Extended ASCII values 128
3. 0 5 i 5 o O io o o0 5 lt x o Ao co e File Menu starting on page 4 2 e Set Menu starting on page 4 5 e View Menu starting on page 4 15 e Pre Process Menu starting on page 4 18 e Tools Menu starting on page 4 19 e Help Menu starting on page 4 27 V2 1 0 Feb 2009 DMx Verifier User Manual 4 1 Chapter DMx Verifier Reference Guide File Menu FIGURE 4 1 File Menu File Set View PreProcess To Open Ctr O Open List mxi Grab F2 Live F3 Save As G S Print Ctrl P help SAMPLE1 BMP Job gt Exit File gt Open This menu item opens a BMP image TIFF image or a RAW image of size 640x480 or 320x240 Although a 24 bit image can be opened and displayed the Auto Check menu is enabled only for 8 bit 256 grayscale values images File gt Open List This menu item opens a list of image files in the same directory This is convenient when you need to perform verification on a list of images without having to manually open each image and then select Auto Check Furthermore you have the option to create two log files txt and prn and save the results to them The file prn can be opened with Microsoft Excel program for further data processing You also have the option to run Auto Check for each image in the list automatically or manually e If Auto mode is selected all images in the list will be processed one after another wit
4. User Manual 2 31 Chapter DMx Verifier Overview 6 Achallenging but readable laser mark with significant Cell Modulation and Print Growth problems shown in DPM FIGURE 2 23 Unused Error Correction Display of the Laser Mark Nominal Cell Size A Center Offset Size Offset Cell Modulation Border Match Symbol Contrast Axial Nonuniformity Print Growth Unused Error Correction Angle of Distortion Overall Grade D PNR PDCR300 1640 M1 MFD 09 00 r 0roco0mr 15 4 25 15 30z 30 2 53 15 30 2 5 30 1 On 86 Off 66 100 52 0 02 D X 26 Y 34 0 65 wrong cells 5 0 0 DPM Status Fair 2 32 DMx Verifier User Manual V2 1 0 Feb 2009 Verification Guidelines and Examples Cell Modulation is more stable than UEC Cell Modulation is a more stable parameter than UEC Below three laser marks of similar quality received different UEC grades A 1 00 B 0 60 and C 0 40 but more consistent CM grades C 75 D 69 and D 66 respectively N os 0 o E o e x sO m V2 1 0 Feb 2009 DMx Verifier TM User Manual 2 33 Chapter DMx Verifier Overview FIGURE 2 25 UEC Display of Laser Marks amp DPM Results Nominal Cell Size Center Offset 13 2 A 03 15 30z 2 0 gt 30 0 Size Offset B 30 15 30z 21 p 30 0 Cell Modulation C On 95 Off 75 A 100 Symbol Contrast 65 Axial Nonuniform
5. D Data regions A 11 storage area A 4 Data Matrix 8 bit binary code A 4 V2 1 0 Feb 2009 DMXx Verifier User Manual Index 1 Index additional features A 10 components A 3 error correction A 5 examples A 2 what itis A 1 Depth of Field 1 9 B 16 Diffuse Lighting B 7 Diffused On Axis Lighting B 12 DMx Verifier scanning options 1 3 starting 1 10 what it is 2 1 DOAL B 12 Dongle 1 4 Dot center offset 2 6 size 2 6 DPM parameters 2 18 standard 2 2 E ECC 000 140 A 5 A 6 A 11 200 A 5 A 7 A 10 A 11 level A 6 EIA A 1 Electronics Industries Association A 1 Encodation Schemes file formats A 7 format strings A 6 Environment 1 5 Error Correction 2 17 codes A 5 Examples iaqg 2 19 verification 2 16 Extended Channel Interpretations A 10 Extension Ring B 4 F Field of View 1 8 B 2 B 4 ensuring best 1 8 File formats A 7 menu 4 2 Finder Pattern A 11 Fixed Pattern Damage 2 10 Fluorescent Lighting B 6 F mount adapter needed with 35mm SLR lens B 2 Focal Length B 2 Focus 1 9 Foreshortening 1 9 Format Strings A 7 Front Lighting B 9 F stop 1 9 B 15 G General Parameters 2 16 Geometry B 5 Grid Nonuniformity 2 9 Ground Loop 1 7 Grounding the camera 1 7 Guidelines verification 2 16 H Help Menu 4 27 Horizontal field of view B 3 l IAQG standard 2 1 verification 2 5 IAQG AS9132 Parameters 2 17 Illumination B 4 Image obtaining a good B 1 Incandescent Lighting B 6 Inspection Opti
6. Please refer to Appendix B Creating A Good Image for more information If the camera needs to be adjusted in the X Y or Z axis the mount must be able to adjust in those directions Provide a way to clamp the lens to minimize image movement Provide strain relief for the camera cable Build a shroud to prevent accidental damage to the camera and to prevent dirt or dust from getting on the lens Ensure that the camera mount is strong enough to prevent bending if it is accidentally hit Be sure to minimize or eliminate vibrations Ensuring the Best Field of View It is best to mount the camera assembly so that its centerline is as near to perpendicular as possible to the desired FOV as shown in Figure 1 3 FIGURE 1 3 Camera Centerline 1 8 DMx Verifier User Manual V2 1 0 Feb 2009 u Installing Hardware This reduces the chance of errors due to e Poor Depth of Field The range of distance with acceptably sharp focus in front and back of the subject is improper for the application e Foreshortening One axis of the image appears shorter than another oD m o gt o Put e o m Where you mount your camera is important because it influences which lens you will use Adjusting the Camera Position After you determine the best FOV for your application and the type of lens and its distance from the object being viewed determine whether there
7. 20 30 22 Cell Modulation B On 82 Off 98 Border Match 100 Symbol Contrast 100 Axial Nonuniformity 4 0 00 Print Growth C X 25 Y 25 Unused Error Correction amp 0 71 wrong cells 4 Angle of Distortion A 0 0 Overall Grade C DPM Status Fair Data Matrix Verifier Correlation Score Test The Center Offset and Size Offset have changed little from sample2 but the Print Growth is very poor at 25 in both the horizontal and vertical directions Auto Check in List Mode You can use List Mode to verify multiple Data Matrix images and save the results to a file 1 Ensure Log is checked in Set gt Log Data 2 Select File gt Open List to display the Open List dialog box 3 Select to highlight the file names to be opened 4 To load the images click Open 5 Select Tools Auto Check to display the Check List in AUTO mode message box Click Yes if you do not wish to examine the graphic display of the verification results The DMx Verifier will step through the image files in the list automatically Click No to examine the graphic display before pressing Space bar to get to the next image 3 14 DMx Verifier User Manual V2 1 0 Feb 2009 Verifier Operations 6 Enterthe name for the log file and select the Save button FIGURE 3 15 Save Log As Dialog Box Save in Cy DMx Verifier etmrkE help oO History amp Desktop Lam My Document
8. 28 0 14 27 8 132 132 20x20 36 8 2608 1954 130 27 6 14 26 2 144 144 22x22 36 8 3116 2335 155 28 5 14 27 6 2 Rectangular Symbols A 8 DMx Verifier User Manual V2 1 0 Feb 2009 Data Matrix Specification Details TABLE A 4 ECC 200 Symbol Attributes continued 8 18 6x16 1 1 10 6 3 58 3 25 8 32 6x14 2 1 20 13 8 52 4 24 12 26 10x24 1 1 32 22 14 46 7 23 37 12 36 10x16 2 1 44 31 20 45 0 23 38 16 36 14x16 2 1 64 46 30 42 9 21 38 16 48 14x22 2 1 98 72 47 36 4 18 32 Note 1 Symbol size does not include a quiet zone Note In the largest symbol 144x144 the first eight Reed Solomon blocks are 218 code words long encoding 156 data code words The last two blocks encode 217 code words 155 data code words All the blocks have 62 error correction code words Note The maximum correctable percentage can range between 28 and 39 Data Matrix Specification Details This section provides excerpts from the AIM International Technical Specification International Symbology Specification Data Matrix 1996 Refer to the AIM Specification for complete information For new applications ECC 200 is recommended ECC 000 140 should only be used in closed applications where a single party controls both the production and reading of the symbols and is responsible for overall system performance The character
9. B DPM Status Good 8511908097 2 20 DMx Verifier User Manual V2 1 0 Feb 2009 Verification Guidelines and Examples 2 A similar mark with slightly worse Dot Center Offset causes it to fail IAQG It has the grade C by DPM since dots are smaller and have more variations in size NO FIGURE 2 4 Dot Center Offset of the Dot Peen Mark i os D gt gt i gt o x sO a FIGURE 2 5 IAQG Results Dot Size B over 70 90 11 8 over 60 105 1 4 Dot Center Offset F over 10 21 5 over 20 2 1 Angle of Distortion A 1 0 D vality B over 20 0 0 Module Fill X 76 Y 79 Symbol Contrast 70 Nominal Module Size 16 9 Overall Grade F IaQG Status Poor 8513107313 V2 1 0 Feb 2009 DMx Verifier User Manual 2 21 Chapter DMx Verifier Overview FIGURE 2 6 DPM Results Nominal Cell Size A 16 9 Center Offset B 4 15 30z 213 p 30z 2 0 Size Offset C66 15 30 5 gt 30 2 1 Cell Modulation A On 90 Off 97 Border Match 4 100 Symbol Contrast A 70 Axial Nonuniformity 4 0 02 Print Growth C X 24 Y 21 Unused Error Correction A 1 00 Angle of Distortion 4 1 0 Overall Grade C DPM Status Fair 8513107313 2 22 DMx Verifier User Manual V2 1 0 Feb 2009 Verification Guidelines and Examples 3 Another mark fails IAQG with worse Dot Center Offset 9 7 of modules are over 20 placement error but better D
10. DMx Verifier User Manual 3 7 Chapter DMx Verifier Operations In the main window the two misidentified cells are marked in a red plus for On cells The rest of the cells in the two corresponding codewords are now marked with a yellow plus and a yellow square respectively as shown in Figure 3 8 FIGURE 3 8 Data Matrix with Wrong Codewords Cells Marked in Red or Yellow in a Wrong Codeword Wrong Codeword The Center Offset is 2 4 a value indicating a minor center offset problem There is one cell that is slightly placed in wrong location e g error is between 1596 and 30 of the nominal cell size There are five cells that have severe placement error e g beyond 30 To view which cells are in the wrong place left click on the Center Offset field in the DMx Data window to switch to the graphic display of the Center Offset in the main window To display only the cells having placement errors greater than 15 uncheck the option Offset 15 in the Center Offset dialog box You can display the dialog box by left double clicking on the Center Offset field in the DMx window or selecting Set Center Offset The single cell having moderate error is marked in yellow and the five cells having severe placement errors are marked in red 3 8 DMx Verifier User Manual V2 1 0 Feb 2009 Verifier Operations FIGURE 3 9 Data Matrix with Center Offset Problem Red Plus Red Plus Yellow Plus
11. DMx Verifier system you must know how to obtain a clear precise image of the part and features you want to inspect Factors that contribute to obtaining a good image include e Determining the Field of View e Selecting a lens e Illuminating the part e Advanced lighting e Aperture Depth of Field e Lighting tips V2 1 0 Feb 2009 DMkx Verifier User Manual B 1 UJ xe oO G m 9 SE per oO pus eo Appendix Creating A Good Image Determining the Field Of View Determining the best FOV that is the area viewed by the camera is your first consideration before setting up a camera for your application The object of interest should appear as large as possible in the FOV The field of view should clearly show the level of detail you want to see while ensuring that the part to be inspected is always seen by the camera The general rule is to fill the FOV with the part you are inspecting leaving enough space around the part to compensate for part positioning This provides a superior image of the part and regions of interest for the system to see In Figure B 1 the image on the left provides more detail and thus a more desirable image than the one on the right FIGURE B 1 Fields of View AN Selecting Lens Selecting a lens is one of the most critical factors for obtaining a good image Lenses used for 35mm SLR cameras are preferable for use with the C
12. Error Correction A 5 Data Matrix Encodation Schemes A 6 ECC 000 140 A 6 ECC 200 A 7 Data Matrix Specification Details A 9 Summary of Additional Features A 10 Symbol Structure A 11 APPENDIX B Creating A Good Image B 1 Introduction B 1 Determining the Field Of View B 2 Selecting Lens B 2 Using the Lens Selection Chart B 3 Illuminating the Part B 4 Lighting Considerations B 5 Types of Lighting B 5 Fluorescent Versus Incandescent Lighting B 6 Lasers B 7 Strobe Lights B 7 Diffuse Versus Point Source Lighting B 7 Placement of Light Sources B 9 Front Lighting B 9 Side Lighting Dark Field B 9 Back Lighting B 10 Polarized Light B 10 V2 1 0 Feb 2009 DMx Verifier User Manual ix Contents Advanced Lighting B 11 DOAL B 12 CDI B 13 SCDI B 14 Aperture B 15 Depth Of Field B 16 Lighting Tips B 16 Index Index 1 DMx Verifier User Manual V2 1 0 Feb 2009 Preface PREFACE Welcome Purpose of This Manual This manual is a comprehensive guide to set up install and use the DMx Verifier software and related hardware It also includes information on Data Matrix symbology and image acquisition Manual Conventions The following typographical conventions are used throughout this manual e tems emphasizing important information is bolded e Menu selections menu items and entries in screen images are indicated as Run triggered Modify etc V2 1 0 Feb 2009 DMx Verifier User
13. FRM FIGURE 1 2 CM4000 Camera 9 a o gt Put e m CM4000 Camera Mount The camera mount holds the camera in a fixed position If the camera moves the verification results may not be valid Refer to Appendix B Creating A Good Image for more information Note Mount the camera in a low vibration environment Otherwise use a strobe in low ambient light Checklist Ensure that the camera is grounded only by the camera cable back to the camera port on the PC The camera case is connected to the camera s return circuit This means that a camera affixed to an earth grounded metallic fixture has the potential for creating a ground loop A ground loop is an undesirable circuit created when grounds are connected at two or more locations Return signals tend to flow through both ground circuits which results in noise and or distortion in the camera s video signal V2 1 0 Feb 2009 DMx Verifier User Manual 1 7 Chapter The camera centerline is perpendicular to the object Before You Begin Isolate the camera s body from grounded fixtures You could use plastic mounting bolts in conjunction with an insulating pad or mount the camera to a non metallic mount and then install the camera mount assembly as a unit Position the camera to get the best Field of View FOV e g optimum viewing of the part and features
14. File gt MXi 4 3 File gt Grab 4 3 File gt Live 4 3 File gt Save As 4 4 V2 1 0 Feb 2009 DMx Verifier User Manual vii Contents File Print 4 4 File gt Job 4 4 File Exit 4 4 Set Menu 4 5 Set ROI 4 5 Set Center Offset 4 6 Set gt Size Offset 4 6 Set gt Error Correction 4 7 Set gt Grading Base 4 8 Set gt Log Header 4 10 Set gt Log Data Delimiter 4 11 Set gt Log String 4 11 Set gt Log Data 4 11 Set gt Internal Sync 4 11 Set gt Hardware Trigger 4 11 Set gt MXi Upload 4 12 Set gt MXi Compression 4 13 Set gt MXi Auto Mode 4 13 View Menu 4 15 View gt DMx Property 4 15 View gt DMx Data 4 15 View gt Threshold Display 4 16 View gt Contrast Display 4 16 View gt Zoom In 4 16 View gt Undo Zoom 4 16 View gt Solid Grid 4 16 View gt Lite Grid 4 16 View gt Camera 4 16 View gt MxXi String 4 16 View gt MXi ID Form 4 17 View gt MXi Header 4 17 Pre Process Menu 4 18 Pre Process gt Undo 4 18 Pre Process gt Erode 4 18 Pre Process gt Dilate 4 18 Pre Process gt Open 4 18 Pre Process gt Close 4 18 Tools Menu 4 19 Tools gt Auto Check 4 19 Tools Contrast Size Calibration 4 19 Tools Target ROI 4 22 viii DMx Verifier User Manual V2 1 0 Feb 2009 Contents Tools gt Encode Data Matrix 4 25 Help Menu 4 27 Help gt License Key 4 27 Help gt About 4 27 APPENDIX A Data Matrix Symbology A 1 Data Matrix Certification A 1 What Is Data Matrix A 1 Data Matrix Components A 3 Bit Versus Code Word A 4 Data Matrix
15. Manual V2 1 0 Feb 2009 Verifier Menu Descriptions FIGURE 4 25 Data Matrix in Center of Target ROI BE DMx Verifier olx Eile EJA aire ajaj eaaa gt Ja SEA A E REE dui 2 Click on the recessed Live button again to stop the live image display Select Tools gt Target ROI gt Setup to display the screen shown in Figure 4 26 V2 1 0 Feb 2009 DMx Verifier TM User Manual 4 23 0 i 5 o O io o o0 a lt o Ao cc Chapter DMx Verifier Reference Guide FIGURE 4 26 Data Matrix with Resizing Squares Displayed IBE Dmx Yerifier Eile Set View PreProcess Tools Help Resizing Squares 3 Left click and drag the small red squares to resize the target ROI to the desired size This target ROI will be displayed in the live image view unless you disable it by selecting Tools Target ROI Enabled to change it to Disabled 4 24 DMx Verifier User Manual V2 1 0 Feb 2009 Verifier Menu Descriptions FIGURE 4 27 Data Matrix with Target ROI Resized IBE DMx Verifier olx 0 9 i 5 o O io o O oa lt x o Ao cc Tools gt Encode Data Matrix This menu item displays the dialog box in Figure 4 28 It allows you to enter the data to be encoded into a square Data Matrix Rectangular Data Matrix will be available later V2 1 0 Feb 2009 DMx Verifier User Manual 4 25 Chapter DMx Verifier Reference Gu
16. O being the best score indicating no placement error and a value greater than 5 indicating significant cell misplacement Center Offset is graded as N i os 0 o E o cs x sO m A if CO lt 2 5 B if CO lt 5 0 Cif CO 7 5 D if CO 10 0 F if CO gt 10 0 To visualize the placement error the DMx Verifier marks e Green Cells having the placement error between 0 and 15 of the nominal cell size e Yellow Cells having the placement error between 15 and 30 of the nominal cell size e Red Cells having the placement error gt 30 of the nominal cell size Size Offset SO Size Offset is a measure of the cell size or cell area uniformity of all On cells To compute Size Offset first the area of each On cell is computed based on edge locations of the cell Then the average area is computed Finally Size Offset is computed as the standard deviation of the areas of all On cells divided by the square of the nominal cell size and then normalized to achieve the proper range between 0 and 10 Size Offset is significant when there are many cells with varying sizes or shapes Size Offset is non negative with 0 being the best score indicating no size variation and a value greater than 5 indicating significant size variation Size Offset is graded as V2 1 0 Feb 2009 DMx Verifier User Manual 2 11 Chapter DMx Verifier Overview A if SO 22 5 B if SO lt 5 0 Cif SO 7 5 D if
17. Offset B 29 15 30 0 gt 30 0 Cell Modulation C On 76 Off 94 Border Match 100 Symbol Contrast B 56 Axial Nonuniformity F 018 Print Growth BX 15 Y 4 Unused Error Correction amp 0 72 wrong cells 1 Angle of Distortion B 3 0 Overall Grade F DPM Status Poor 12345678 V2 1 0 Feb 2009 DMx Verifier User Manual 2 35 Chapter DMx Verifier Overview 2 36 DMx Verifier User Manual V2 1 0 Feb 2009 CHAPTER 3 DMx Verifier Operations GO This chapter explains how to operate the DMx Verifier with the MXi interface Sample bitmap images mentioned in this overview are provided with your installation software We recommend that you consult Chapter 4 as necessary for complete descriptions of all product functionality to Oc o e gt o X o a Note This chapter serves as a guide Your results may vary Verifier Operations Auto Check Auto Check performs the full verification process to obtain the measurement results The following sample images explain how to use the Verifier to measure the print quality based on DPM Select the DPM grading base and use the default options in DPM Status Configuration as shown in Figure 3 1 V2 1 0 Feb 2009 DMx Verifier User Manual 3 1 Chapter DMx Verifier Operations FIGURE 3 1 Grading Base Grading Base Mode DPM C AIM C IAQG C 180 15415 Status Color Key ES
18. identification and data capture techniques Bar code symbology specifications Data Matrix in 2000 e AQG The SAE Standard AS9132 Data Matrix Quality Requirements for Parts Marking was developed and published by IAQG International V2 1 0 Feb 2009 DMx Verifier User Manual 2 1 Chapter DMx Verifier Overview Aerospace Quality Group in 2002 This marking standard covers three major processes Dot Peening Laser Etching Hlectro Chem Etching SO 15415 The latest Data Matrix verification standard ISO IEC 15415 Information technology Automatic identification and data capture techniques Bar code symbol print quality test specification Two dimensional symbols was released in 2004 For Data Matrix symbology the standard covers both paper labels and direct part marks e DPM The need for an effective verification method by the customers prompted Microscan to develop and patent in 1999 the unique verification methodology named DPM Verification By incorporating and enhancing the parameters for paper labels from the AIM verification Microscan further added several important parameters that have proven to be the most effective and reliable metric for judging the quality of direct part marks The DMx Verifier measures all parameters specified in all supported standards AIM ISO 15415 IAQG AS 9132 and is compliant with these standards It also provides other relevant information about th
19. opening is the most important influence in determining the depth of field e When using a small aperture high f stop number much of the area both in the foreground and background of the object will be in focus More light is required when the aperture is small This provides greater depth of field and reduces the effects of ambient light e When using a large aperture the object is in focus but the areas in the foreground and background of the object are out of focus e Many lenses come with an information sheet detailing depth of field at various F stop settings and working distances Lighting Tips e To light a round part try using a round light source that provides even lighting on the inspected parts such as CDI Cloudy Day Illumination e Experiment with different light positions and sources until you find the best illumination for your part e Ifyou place a point source light close to the part you will likely produce a harsh glare with black shadows e To fill in minimize shadows use lighting sources with a diffuser such as CDI e Your lighting should be much brighter than the room in which the inspection is taking place e tisoften best to light the environment not the part e An enclosure around the inspection station will minimize the impact of ambient light as well as protect lights and cameras Lighting provides a clear image that is not too bright or too dark and enables the Vision Processor to ide
20. screwdriver Microscan provided ESD ground strap Installing the 0300 Board Use the following procedure to install the 0300 board 1 2 Remove the cover of your PC Locate an open PCI slot Unscrew the port access covers on the PC Install the 0300 board by aligning the gold fingers and pressing the module firmly into the slot V2 1 0 Feb 2009 DMXx Verifier IM User Manual 1 5 Chapter Before You Begin 5 Fasten the 0300 board with port access screws Installing the Internal Camera Power Cable 1 Connect the small connector of the internal Camera Power Cable to the Camera Power connector on the 0300 board as shown in Figure 1 1 FIGURE 1 1 Internal Cabling Camera Power Cable I O Ribbon Cable Power Supply 2 Connect the middle connector to an unused Hard Drive power cable in the PC Connecting the Camera Cable Connect the adapter cable to the Camera Port on your PC Connect the camera cable from the RS170 camera to the other end of the adapter 1 6 DMx Verifier User Manual V2 1 0 Feb 2009 u Installing Hardware Figure 1 2 shows an RS170 camera a factory modified CM4000 camera The connectors at the rear of the camera supply power and sync to the camera and send video from the camera to the 0300 board The IRIS and VIDEO connectors are not used for normal operations Set the switches to 1 0 MGC and
21. the poorer the image displayed in the Verifier For the Verifier to produce consistent verification results we do not recommend that you use compression ratios higher than 8 1 You can use 16 1 or 32 1 if you want to quickly view the image captured by the MXi Set gt MXi Auto Mode FIGURE 4 14 MXi Auto Mode 0 0 i 5 o O io o O 5 lt x o Ao cc Mxi Auto Mode Y v Auto Upload v Auto Save v Auto Check v Auto Send This menu item is visible when MXi is connected to the PC s serial port By default MXi Auto Mode is disabled e Auto Upload If this option is checked whenever MXi decodes a Data Matrix by pressing the button the Data Matrix image is automatically uploaded from the MXi Captured buffer to the Verifier to be displayed V2 1 0 Feb 2009 DMx Verifier TM User Manual 4 13 Chapter DMx Verifier Reference Guide Auto Save Auto Save Auto Upload What It Means Checked Checked Whenever MXi decodes a Data Matrix the Data Matrix image is automatically uploaded in the Verifier and automatically saved to the PC s hard drive Checked Unchecked Whenever you select File MXi to upload the image from the MXi to the Verifier the image is displayed and saved automatically When you enable the Auto Save mode by checking it Verifier displays the Save As dialog box for you to enter the file name This file name is used by the Verifier in generating the subsequent fi
22. to the AIM specification Axial Nonuniformity measures how different the average spacing between centers of adjacent cells in horizontal axis is from that of vertical axis A square Data Matrix with the same number of rows and columns tends to look like a rectangular Data Matrix if Axial Nonuniformity is significant The parameter is measured according to the AIM specification Axial Nonuniformity is graded as V2 1 0 Feb 2009 DMx Verifier TM User Manual 2 13 Chapter DMx Verifier Overview A if AN lt 0 06 B if AN 0 08 Cif AN 0 10 D if AN lt 0 12 F if AN gt 0 12 Print Growth PG Print Growth measures how much the Data Matrix cells are over or under printed marked in both X and Y directions X Print Growth XPG is computed as the difference between the average width of all On cells and the X Nominal Cell Size divided by the X Nominal Cell Size Y Print Growth YPG is computed as the difference between the average height of all On cells and the Y Nominal Cell Size divided by the Y Nominal Cell Size Print Growth PG is defined as the larger value of IXPG TPGI and IYPG TPGI where TPG is the Target Print Growth Target Print Growth represents the best print growth value required for the marking application and is default to 0 For dot peen marks you may choose to mark the dot size to be a certain percentage smaller than the nominal cell size and set the TPG to be a negative value such as 0 10 or 0 20 Pr
23. 09 DMx Verifier User Manual 2 29 Chapter DMx Verifier Overview 4 Alaser mark with significant Cell Modulation error in DPM due to significant background variation FIGURE 2 19 Unused Error Correction Display of the Laser Mark Nominal Cell Size 158 Center Offset 41 2 15 30 0 gt 30 0 Size Offset C 54 15 30 8 gt 30 0 Cell Modulation C On 94 Off 78 Border Match 100 Symbol Contrast amp 73 Axial Nonuniformity 4 0 00 Print Growth BX 13 Y 7 Unused Error Correction amp 1 00 Angle of Distortion 4 0 0 Overall Grade C DPM Status Fair 12345678901 2345 2 30 DMx Verifier User Manual V2 1 0 Feb 2009 Verification Guidelines and Examples 5 Alasermark with significant Size Offset error in DPM due to significant cell size variations NO FIGURE 2 21 Size Offset Display of the Laser Mark m al A A i os gt gt i gt o x sO a FIGURE 2 22 DPM Results Nominal Cell Size 143 Center Offset B 3 6 15 30z 2 4 30z 2 0 Size Offset D 83 15 30z 22 p 30 2 Cell Modulation A On 83z Off 95 Border Match 100 Symbol Contrast B 59 Axial Nonuniformity 4 0 01 Print Growth B Xx 18z Y 18 Unused Error Correction 1 00 Angle of Distortion 4 0 0 Overall Grade D DPM Status Fair 0123456789 V2 1 0 Feb 2009 DMx Verifier
24. 12 e CDI M Cloudy Day Illumination Refer to CDI on page B 13 e SCDI Square Continuous Diffuse Illumination Refer to SCDI on page B 14 Figure B 10 illustrates these lighting types and their applications xe Oo G Tm 9 SE per oO lt b i9 V2 1 0 Feb 2009 DMx Verifier User Manual B 11 Appendix Creating A Good Image FIGURE B 10 Lighting Solutions for Image Absorptive Features DIFFUSE SURFACE SPECULARITY e MIRROR LIKE PLANAR COPY PAPER SEMICONDUCTOR WAFER DIE GEOMETRY INDEPENDENT LIGHTING o gt WHITEBOARD CURVED WHITE Qo SURFACE GEOMETRY UNDULATING BEVERAGE Ne Ne CONTAINER General Solution WRINKLED SURGICAL PAPER INSTRUMENTS SHRINK TRAREED DIMPLED FOIL FACETED PLASTIG To address your lighting issues contact NER at Microscan Inc 486 Amherst St Nashua NH 03063 Tel 603 598 8400 Fax 603 577 5976 DOAL Ideal for flat specular surfaces Diffused On Axis Lighting provides more than 300 greater angular coverage of the lighting envelope than a similarly sized fluorescent ring light DOAL can be used at a distance to provide uniform wide angle colluminated illumination for imaging highly specular flat surfaces Refer to Figure B 11 e Superior uniformity e Significantly enhances image quality e Improves the accuracy and repeatability of machine vision performance on specular surfaces DMx Verifier User Manu
25. 255 8 16 C40 Primary upper case alphanumeric 5 33 Text Primary lower case alphanumeric 5 33 X12 ANSI X12 EDI data set 5 33 EDIFACT ASCII values 32 94 6 Base 256 All byte values 0 255 8 Table A 4 lists ECC symbol attributes V2 1 0 Feb 2009 DMx Verifier User Manual A 7 Appendix Data Matrix Symbology TABLE A 4 ECC 200 Symbol Attributes Symbol Data Size Region Sm Data Capacity Error Max leaved Byt Correction Correctable N Block Num Alphanu e Overhead Percentage Row Col Size Oo S Cap m Cap Cap 96 96 10 10 8x8 1 1 6 3 1 62 5 25 12 12 10x10 1 1 10 6 3 58 3 25 14 14 12x12 1 1 16 10 6 55 6 28 39 16 16 14x14 1 1 24 16 10 50 0 25 38 18 18 16x16 1 1 36 25 16 43 8 22 34 20 20 18x18 1 1 44 31 20 45 0 23 38 22 22 20x20 1 1 60 43 28 40 0 20 34 24 24 22x22 1 1 72 52 34 40 0 20 35 26 26 24x24 1 1 88 64 42 38 9 19 35 32 32 14x14 4 1 124 91 60 36 7 18 34 36 36 16x16 4 1 172 127 84 32 8 16 30 40 40 18x18 4 1 228 169 112 29 6 15 28 44 44 20x20 4 1 288 214 142 28 0 14 27 48 48 22x22 4 1 348 259 172 28 1 14 27 52 52 24x24 4 2 408 304 202 29 2 15 27 64 64 14x14 16 2 560 418 278 28 6 14 27 72 72 16x16 16 4 736 550 366 28 1 14 26 80 80 18x18 16 4 912 682 454 29 6 15 28 88 88 20x20 16 4 1152 862 574 28 0 14 27 96 96 22x22 16 4 1392 1042 694 28 1 14 27 104 104 24x24 16 6 1632 1222 814 29 2 15 28 120 120 18x18 36 6 2100 1573 104
26. 3 xX m uo FIGURE A 3 Data Matrix Components T Ke ERES SE l T Quiet Zone aw Solid Border Data Storage V2 1 0 Feb 2009 DMx Verifier TM User Manual A 3 Appendix Data Matrix Symbology The DMx Verifier uses the solid border to calculate the rotation of a Data Matrix symbol The DMx Verifier uses the broken border to identify the number of rows and columns in a symbol The data storage area contains the binary information that was encoded during the construction of the Data Matrix The data storage area is illustrated in Figure A 4 showing how data is stored in 8 bit format Each encoded data character can be represented by an 8 bit binary code The character M for example is 07001101 1 dark cell 0 light cell M is stored in the Data Matrix as shown FIGURE A 4 Data Matrix Storage M 01001101 The Quiet Zone is a clear white space surrounding the Data Matrix without clutter or text of any kind The width of the quiet zone must be at least the size of one cell The quiet zone should be at least 1096 of the width or height of the symbol in order to achieve an optimum read rate Bit Versus Code Word The ECC200 Data Matrix uses a byte oriented one Code Word error detection and correction algorithm The non ECC200 uses a bit oriented algorithm Each ECC200 Data Matrix consists of multiple code words Each code word contains 8 bits also called elements or cells as shown in Figure A
27. 5 A 4 DMx Verifier User Manual V2 1 0 Feb 2009 Data Matrix Error Correction FIGURE A 5 Shows 8 bits as 1 code word 1 2 TE 5 _7 8 bits 1 code word 6 7 8 The AIM Specification is designed for ECC200 which is code word based If any cell within the code word is incorrectly identified the code word is subsequently affected by that bit and thus requires error correction Since it is the code word that matters in the error correction algorithm one single bit can cause the same amount of damage as the eight wrong bits in the same code word For example if one bit within the code word is in error the entire code word is in error Likewise if multiple bits within the same code word e g 2 8 bits are in error this still counts as one code word in error The DMx Verifier is designed to cover both ECC200 and non ECC200 Data Matrices As a result the number of wrong cells or bits not code words is displayed in the DMx Verifier The code word affected by displayed bits can also be displayed for the ECC200 Data Matrix gt Data Matrix Error Correction Error correction provides safeguards and additional capabilities for handling poorly printed or damaged symbols You select Error Correction Codes ECC when encoding the Data Matrix symbol Data Matrix is the only symbology that offers both Reed Solomon ECC 200 and Convolutional error correction codes ECC 000 140 Reed Solomon is a byte corr
28. 8 Symbol Contrast SC 2 8 Axial Nonuniformity AN 2 8 Grid Nonuniformity GN 2 9 Unused Error Correction UEC 2 9 Fixed Pattern Damage 2 10 Modulation 2 10 Print Growth 2 10 Scan Grade 2 10 Overall Grade 2 10 DPM Verification 2 10 Center Offset CO 2 11 Size Offset SO 2 11 Cell Modulation CM 2 12 Border Match BM 2 12 Symbol Contrast SC 2 13 Axial Nonuniformity AN 2 13 Print Growth PG 2 14 vi DMx Verifier User Manual V2 1 0 Feb 2009 Contents Unused Error Correction UEC 2 14 Angle of Distortion AD 2 15 Overall Grade 2 15 Verification Status 2 15 Verification Guidelines and Examples 2 16 System Setup 2 16 Parameter Considerations 2 16 General Parameters 2 16 IAQG AS9132 Parameters 2 17 ISO 15415 Parameters 2 18 DPM Parameters 2 18 Examples of Data Matrix Verification 2 19 IAQG 2 19 DPM 2 27 CHAPTER 3 DMx Verifier Operations 3 1 Verifier Operations 3 1 Auto Check 3 1 Sample 1 Perfect Data Matrix Image 3 3 Sample 2 Data Matrix with Errors 3 6 Sample 3 Overprinted Data Matrix 3 11 Sample 4 Underprinted Data Matrix 3 13 Auto Check in List Mode 3 14 Verification Results Reporting 3 16 Printing the Verification Results Only 3 16 Printing the Data to a File 3 17 Printing the Image with Verification Results 3 17 Printing the Image Only 3 17 CHAPTER 4 DMx Verifier Reference Guide 4 1 Verifier Menu Descriptions 4 1 File Menu 4 2 File gt Open 4 2 File gt Open List 4 2
29. GURE 2 11 IAQG Results Dot Size F over 70 90 53 3 over 60 105 2 5 Dot Center Offset F over 10 9 3 over 20 4 5 Angle of Distortion A 20 Ovality B over 20 0 3 Module Fill X 98 Y 104 Symbol Contrast TUE Nominal Module Size 18 3 mn Overall Grade IAQG Status Poor 00122B566613974XH V2 1 0 Feb 2009 DMx Verifier User Manual 2 25 Chapter DMx Verifier Overview FIGURE 2 12 DPM Results Nominal Cell Size 18 3 Center Offset B 46 15 30z 217 30 2 8 Size Offset B 26 15 30z 21 p 30 0 Cell Modulation B On 8 Off 83 Border Match 100 Symbol Contrast A TUE Axial Nonuniformity A 0 01 Print Growth A Xz 2z Y 4 Unused Error Correction amp 0 89 wrong cells 1 Angle of Distortion 2 0 Overall Grade B DPM Status Good 00122B566613974 H 2 26 DMx Verifier User Manual V2 1 0 Feb 2009 Verification Guidelines and Examples DPM N DPM Verification is accurate sensitive and robust 1 A good dot peen mark gets the grade B with DPM FIGURE 2 13 Unused Error Correction Display of the Dot Peen Mark i os D gt 0 gt 6 x sO a FIGURE 2 14 DPM Results Nominal Cell Size 187 Center Offset 20 15 30 2 gt 30 0 Size Offset 23 15 30 0 gt 30 2 0 Cell Modulation B On 92 Off 82 Border Match 100 Symbol Contrast B 63 Axial Nonunif
30. Good ESI Fair ERA Poor Advanced DPM Status Configuration IV Cell Size Grade M Center Offset Grade V Size Offset Grade V Cell Modulation Grade M Border Match Grade IV Axial Uniformity Grade IV Print Growth Grade V Error Correction Grade Jw Distortion Angle Grade 3 2 DMx Verifier User Manual Verifier Operations Sample 1 Perfect Data Matrix Image Open the file samplel bmp from the Help folder under the application directory the default directory is C Program Files DMx Verifier Select Tools gt Auto Check to perform the verification When the verification process is completed the main window shows the error correction graphic display The correct On cells are marked in green plus signs as shown in Figure 3 2 Note The small red squares touching the Data Matrix borders are not part of the error correction graphic display Cn FIGURE 3 2 Perfect Data Matrix Image to Oc o e gt o X o a If the Zoom tool bar or the Zoom menu under View menu is enabled then you can select it to obtain a larger display of the Data Matrix In this example the Data Matrix is big in the image and no magnification is allowed The measurement results are also displayed in a DMx Data window as shown in Figure 3 3 V2 1 0 Feb 2009 DMx Verifier User Manual 3 3 Chapter DMx Verifier Operations FIGURE 3 3 DMx Data Window amp DMx Data E
31. M4000 camera than standard C mount lenses when performing accurate measurements Lenses for 35mm SLR cameras are more optically accurate and therefore more expensive However they are larger than C mount camera lenses and may cause a problem in mounting a camera in a particular enclosure To use an 35mm SLR camera lens with your CM4000 camera you need to use a C mount to F mount adapter Use the Lens Selection Chart as shown in Figure B 2 to determine the lens size As a general guideline lenses that have a longer focal length make the object appear closer larger and show less of the background For example a 50mm lens has a longer focal length than a 25mm lens B 2 DMx Verifier User Manual V2 1 0 Feb 2009 Selecting Lens FIGURE B 2 Lens Selection Chart 7 0 F 25mm F 12 5mm 9 E Pa SB sus 5 0 d d ut 1 wre ye F 35mm gt E P L 49 L pe p di P 30 ra e pod p P F 50mm Ps p 9 20 ec el F 75mm PN ee E P p di pur y B 15 10 7 7 i5 e50 pe e 959 30 D FY Horizontal Field of View inches D Part to Camera Distance in inches from the part to the front mounting hole Note The number under a dot on the camera indicates the size in millimeters of the needed extension ring If no B F Camera Lens in mm number appears under the dot an extension ring is not needed Using the Lens Selection Chart The Lens Selection Chart h
32. MICROSCAN DMx Verifier User Manual V2 1 0 Feb 2009 EM 20136 1V210 Copyright and Disclaimer Copyright 2009 by Microscan Systems Inc 1201 S W 7th Street Renton WA U S A 98057 425 226 5700 FAX 425 226 8682 All rights reserved The information contained herein is proprietary and is provided solely for the purpose of allowing customers to operate and or service Microscan manufactured equipment and is not to be released reproduced or used for any other purpose without written permission of Microscan Throughout this manual trademarked names might be used Rather than place a trademark TM symbol at every occurrence of a trademarked name we state herein that we are using the names only in an editorial fashion and to the benefit of the trademark owner with no intention of infringement Disclaimer The information and specifications described in this manual are subject to change without notice Latest Manual Version For the latest version of this manual see the Download Center on our web site at www microscan com Technical Support For technical support email helpdesk microscan com Microscan Systems Inc 1201 S W 7th Street Renton WA 98057 U S A Tel 425 226 5700 Fax 425 226 8250 helpdesk microscan com Microscan Europe Tel 31 172 423360 Fax 31 172 423366 Microscan Asia Pacific R O Tel 65 6846 1214 Fax 65 6846 4641 Microscan Limited Warranty Statement and Exclusions What Is Co
33. MXi information and is visible when MXi is connected to the PC V2 1 0 Feb 2009 DMx Verifier User Manual 4 17 Chapter DMx Verifier Reference Guide Pre Process Menu FIGURE 4 19 Pre Process Menu Pre Process Ic Unao Erode Dilate Open Close When the Data Matrix quality is too poor for the verification to be successful use the Pre Process Menu to enhance the image quality Proper preprocessing steps may enhance the image such that the measurement results can be obtained Although the results only represent the quality of the Data Matrix mark with image enhancement they can still provide useful information to help identify various mark quality problems Pre Process gt Undo Use this menu item to undo any preprocessing step s and restore the original image Pre Process gt Erode Use this menu item to erode light pixels to increase the size of dark cells and reduce the size of light cells in a Data Matrix image Use this when On cells are too small in a dark on light image or too large in a light on dark image Pre Process gt Dilate Use this menu item to dilate light pixels to reduce the size of dark cells and increase the size of light cells in a Data Matrix image Use this when On cells are too large in a dark on light image or too small in a light on dark image Pre Process Open This is equivalent to Erode followed by Dilate Use this to remove small light colored defects in a Data Matr
34. Manual xi Preface xii DMx Verifier User Manual V2 1 0 Feb 2009 m 9 a o gt o Put e a CHAPTER 1 Before You Begin Before you install your DMx Verifier system ensure that you have all the necessary components This chapter presents the steps to help you prepare for and perform a successful hardware and software installation DMx Verifier The DMx Verifier is a complete 2D Direct Part Mark DPM quality verification system for the Data Matrix symbology It is designed to work on all types of direct part marking and label marking applications It is compliant with major public standards for Data Matrix quality verification such as the original AIM Uniform Symbology Specification for Data Matrix or ISO IEC 16022 the AS9132 standard Data Matrix Quality Requirements for Parts Marking by IAQG and the ISO IEC 15415 standard Bar code symbol print quality test specification Two dimensional symbols Additionally to robustly measure the quality and predict the readability of the Data Matrix direct part marks the patented DPM method is offered which measures several unique parameters that are pertinent to direct part marks The Base and System configurations are designed for use with PC systems running Windows 2000 XP You can print or save to a file the verification results from the DMx Verifier V2 1 0 Feb 2009 DMx Verifier User Manual 1 1 Chapter Before You B
35. SO lt 10 0 Fif SO 10 0 To visualize the cell size or area variation the DMx Verifier can optionally mark e Green Cells whose areas do not exceed 15 of the average area e Yellow Cells whose areas are between 15 and 30 of the average area e Red Cells whose areas are more than 30 of the average area Cell Modulation CM Cell Modulation is a measure of the spread of the gray scale values of cells of the same polarity On Cell Modulation is computed based on the standard deviation of grayscale values of all On cells Off Cell Modulation is computed based on the standard deviation of grayscale values of all Off cells To achieve good or high Cell Modulation the standard deviation for On cells and Off Cells must be minimized respectively A Data Matrix mark with good Cell Modulation should produce an image such that all the dark cells have very similar low grayscale values and all the light cells have very similar high grayscale values The Cell Modulation problem arises when the cells of the same polarity have large variations in grayscale values In extreme cases the grayscale values of some On cells can approach those of the Off cells and vice versa which can make the determination of the cell polarity i e if a cell is dark or light more difficult Cell Modulation is the smaller of On Cell Modulation and Off Cell Modulation It has a range between 0 and 100 and is graded as A if CM gt 90 B if CM gt 80 C
36. The Data Matrix verification based on ISO IEC 15415 measures and grades these parameters V2 1 0 Feb 2009 DMx Verifier User Manual 2 7 Chapter DMx Verifier Overview e Reference Decode e Symbol Contrast e Axial Nonuniformity e Grid Nonuniformity e Unused Error Correction e Fixed Pattern Damage e Modulation Print Growth is measured but not graded Because Modulation requires modulation scores to be computed for each codeword used in the Reed Solomon error correction process ISO 15415 verification is only applicable to ECC200 Data Matrix Reference Decode The symbology Reference Decode Algorithm decodes the Data Matrix Reference Decode is graded as A if the Data Matrix is successfully decoded F if the Data Matrix cannot be decoded Symbol Contrast SC Symbol Contrast is the difference between the highest and lowest reflectance values in the Data Matrix area including the quiet zone It is graded as A if SC gt 7096 B if SC gt 5596 C if SC gt 40 D if SC gt 20 F if SC 2096 Axial Nonuniformity AN Note The parameter is measured and graded according to the AIM specification Axial Nonuniformity measures how different the average spacing between centers of adjacent cells in horizontal axis is from that of vertical axis A square 2 8 DMx Verifier User Manual V2 1 0 Feb 2009 Description of Measured Parameters Data Matrix with the same number of rows and column
37. To do this place in the center of the FOV the same target that was used in the calibration setup process Then select Tools Calibration Check If no re calibration is necessary you will get this message Calibration OK No need to re calibrate V2 1 0 Feb 2009 DMx Verifier User Manual 4 21 Chapter DMx Verifier Reference Guide Otherwise you may get one of the following messages if an incorrect target was used or the light intensity or FOV has changed Please use original calibration target Image too dark Please re calibrate Image too bright Please calibrate Cell Size too small Please calibrate Cell Size too large Please calibrate Failed to decode Please adjust image Tools Target ROI FIGURE 4 24 Target ROI Menu Item Setup Disabled This menu item allows you to set up a target ROI window i e view finder to be displayed with live images Uniform lighting is necessary for obtaining accurate and repeatable measurement results The use of the target ROI helps the operator place the Data Matrix marks of the same size in the center area where the lighting is more uniform The following are the steps for setting up the target ROI 1 Select Tools Target ROI Disabled once so it becomes Enabled Click Live to display the target ROI in live image mode Place the Data Matrix mark to be measured in the center of the target ROI as shown in Figure 4 25 4 22 DMx Verifier User
38. Verification Good Fair Poor It is configured based on the individual parameter grade for DPM verification or the Overall Grade for AIM ISO 15415 and IAQG verifications The verification status is such that grade A is always Good and grade F is always Poor and grade B C or D can be configured to be any of the Good Fair and Poor status as long as no lower grade is assigned a better status If the Fair status is not used then the verification status has two outcomes only Good or Pass and Poor or Fail For AIM ISO 15415 and IAQG Data Matrix verification the verification status is configured using the Overall Grade The default configuration is grade B is Good and grade C and D are Fair For DPM verification the verification status is not configured using the Overall grade Instead the verification status for each parameter is configured individually and determined by the grade of the parameter The default status configuration for each parameter is that grade B is Good and grade C and D are Fair The verification status for the DPM verification is chosen to be the lowest verification status of all enabled parameters V2 1 0 Feb 2009 DMx Verifier User Manual 2 15 Chapter DMx Verifier Overview Verification Guidelines and Examples The goal of the Data Matrix quality verification is to ensure that the Data Matrix mark has sufficient quality and margin of error so that it can be read reliably over the service life of t
39. al Inherent Symbols are intended to be read when marked such that the image is either dark on light or light on dark Extended Channel Interpretations ECC 200 only optional This mechanism enables characters from other character sets e g Arabic Cyrillic Greek Hebrew and other data interpretations or industry specific requirements to be represented A 10 DMx Verifier User Manual V2 1 0 Feb 2009 Symbol Structure e Rectangular symbols ECC 200 only optional Six symbol formats are specified in a rectangular form e Structured append ECC 200 only optional This allows files of data to be represented in up to 16 Data Matrix symbols The original data can be correctly reconstructed regardless of the order in which the symbols are scanned Symbol Structure Each Data Matrix symbol consists of data regions which contain nominally square modules set out in a regular array In larger ECC 200 symbols data regions are separated by alignment patterns The data region is surrounded by a finder pattern and as a result is surrounded on all four sides by a quiet zone border The Finder Pattern is a perimeter to the data region and is one module wide Two adjacent sides left and lower sides forming the L shaped boundary are solid dark lines These sides primarily determine physical size orientation and symbol distortion The two opposite sides are made up of alternating dark and light modules These are used prim
40. al V2 1 0 Feb 2009 Advanced Lighting e llumination sources include LED fiber optic and micro fluorescent sources e Flexible light field dark field illumination characteristics depending on distance to target FIGURE B 11 Diffused On Axis Lighting Camera 4 Light Source 4 t EMEN o CDI UJ Ideal for very uneven specular surfaces Continuous Diffuse Illumination CDI also known as Cloudy Day Illumination provides a hemisphere of diffuse uniform illumination The complete lighting envelope has even lighting from all directions The use of a curved beam splitter completes the horizon to horizon illumination On axis and off axis lighting is controlled separately to ensure that uniformity remains in balance Refer to Figure B 12 o 97 i E e Outstanding uniformity up to 10 maximum deviation within the lighting envelope o o o o lt D c o e S e llumination sources include LED fiber optic and white microfluorescent sources V2 1 0 Feb 2009 DMx Verifier TM User Manual B 13 Appendix Creating A Good Image FIGURE B 12 Continuous Diffuse Illumination Camera Beam Light S axi Splitter ight Source on axis Y Light Source off axis EMEN o SCDI Ideal for uneven specular surfaces Square Continuous Diffuse Illumination SCDI increases the uniformity of on axis illumination b
41. arily to define the cell structure of the symbol but can also assist in determining physical size and distortion gt Regarding Symbol Sizes and Capacities the ECC 000 140 symbols consist of an odd number of rows and columns Symbols are square with sizes from 9x9 to 49x49 modules not including quiet zones These symbols can be recognized by the upper right corner module being dark For an image of reversed polarity it would be light Complete attributes for ECC 000 140 symbols are provided in the AIM International Technical Specification International Symbology Specification Data Matrix 1996 XL 2O o ge eO ECC 200 symbols consist of an even number of rows and columns Some symbols may be square with sizes from 10x10 to 144x144 not including the quiet zone Other symbols may be rectangular with sizes from 8x8 to 16x48 not including quiet zone All ECC 200 symbols can be recognized by the upper right corner being light dark For an image of reversed polarity it will be dark Complete attributes of ECC 200 symbols are provided in the AJM International Technical Specification International Symbology Specification Data Matrix 1996 V2 1 0 Feb 2009 DMx Verifier User Manual A 11 Appendix Data Matrix Symbology A 12 DMx Verifier User Manual V2 1 0 Feb 2009 appenpxe Creating A Good Image This appendix provides guidance on creating a good image Introduction To successfully use your
42. ate copper and steel Make variable colored parts appear more similar to camera Strobe Strobe Source and Synch Box Use wherever the part moves more than one pixel in 17 milliseconds V2 1 0 Feb 2009 DM x Verifier User Manual UJ o o o o lt 2 c 5 o e S Appendix Creating A Good Image B 18 DMx Verifier User Manual V2 1 0 Feb 2009 ndex Numerics 8 bit Binary Code A 4 A Additional Features A 10 AIAG A 1 AIM A 1 A 9 standard 2 1 verification 2 3 Angle of Distortion 2 7 2 15 3 5 ANSI A 7 Aperture B 15 ASCII A 7 Auto Check 3 1 3 14 Automatic Identification Manufacturers International Inc A 1 Automotive Industry Action Group A 1 Axial nonuniformity 2 4 2 8 2 13 2 17 uniformity 3 5 B Back Lighting B 10 Barcode A 2 Binary Code A 4 Bit Versus Code Word A 4 Border Match 2 12 3 4 Broken Border A 4 C Camera cables 1 6 1 8 clamping lens 1 9 connecting cable 1 6 connection 1 6 f stop B 15 grounding 1 7 mount checklist 1 7 mounting 1 7 1 8 positioning 1 9 CDI B 13 Cell modulation 2 12 3 4 Center Offset 2 11 2 18 3 4 Certifications A 1 Checklist camera mount 1 7 Clamping Camera Lens 1 9 CM4000 1 7 C mount Adapter needed with 35mm SLR lens B 2 Code Word Versus Bit A 4 Components data matrix A 3 Configuration base 1 2 Considerations parameter 2 16 Continuous Diffuse Illumination B 13 Contrast 3 4
43. bility to e Select output size ranging from 001 square inches to 14 square inches regardless of the amount of data encoded e Encode up to 3116 numeric characters or 2335 alphanumeric characters in a single symbol e Encode and read many supported international languages e Easily integrate with existing computer systems Data Matrix symbols are capable of carrying 25 to 100 times more information than the typical barcode This range is directed related to the image quality that the printer is capable of producing The following summarizes the characteristics of 2D Data Matrix e Both height amp width encode data e Works with contrast as low as 20 e Readable through 360 of rotation e Designed to survive harsh industrial environments e Codes can be marked on the surface of a part without using a paper label e Every DM code is half black and half white to help ensure that cell damage will not harm readability e Several error correction schemes are available to optimize symbol damage recovery A 2 DMx Verifier User Manual V2 1 0 Feb 2009 Data Matrix Components e Advanced image processing is used for higher read rates of cluttered and or damaged symbols Figure A 2 illustrates a Data Matrix on an actual part FIGURE A 2 Data Matrix Example A Data Matrix Components Data Matrix consists of a solid border a broken border a data storage area and a quiet zone as depicted in Figure A
44. cked two log files txt and prn will be created in the application directory when a list of Data Matrix images are verified using the Open List menu 0 HO i 5 E O o O O 5 lt x o Ao co e When Log is unchecked verifications data will not be saved to the log files when Open List is used for analyzing a list of Data Matrix images Set gt Log Data gt Delete If no log files txt and prn have been created this menu item is grayed out Once the log files are created the menu becomes enabled Selecting Delete will delete the two log files Once the log files are deleted the menu is grayed out again Set gt Internal Sync You need to check this if you use the Internal Sync MVi camera from NER Set gt Hardware Trigger To use the Opto I O board to trigger the 0300 board to acquire an image you need to check the Hardware Trigger option then select File gt Grab When a trigger occurs an image will be acquired for you to perform Auto Check V2 1 0 Feb 2009 DMx Verifier User Manual 4 11 Chapter DMx Verifier Reference Guide Set MXi Upload FIGURE 4 12 MXi Upload Mxi Upload v Captured Mxi Compression Decoded Mxi Auto Mode gt Frozen Downloaded This menu item is visible when MXi is connected to the PC s serial port MXi Upload allows an image stored in the MXi to be uploaded to the Verifier to be displayed MXi has four buffers for storing images consult the MXi User Manual for comp
45. computed Symbol Contrast is the difference of the two means divided by the full gray scale range Note Symbol Contrast is sensitive to the lighting change thus an uncalibrated value has little meaning V2 1 0 Feb 2009 DMx Verifier TM User Manual 2 3 Chapter DMx Verifier Overview To use this parameter properly contrast calibration must be performed first Symbol Contrast is graded as A if SC gt 75 B if SC gt 55 Cif SC gt 40 D if SC gt 20 if SC lt 20 Axial Nonuniformity AN Axial Nonuniformity measures how different the average spacing between centers of adjacent cells in horizontal axis is from that of vertical axis A square Data Matrix with the same number of rows and columns tends to look like a rectangular Data Matrix if Axial Nonuniformity is significant Axial Nonuniformity is graded as A if AN lt 0 06 B if AN lt 0 08 Cif AN 0 10 D if AN lt 0 12 F if AN gt 0 12 Print Growth PG Print Growth measures how much the cells comprising the Data Matrix have grown or shrunk from nominal cell size X Print Growth and Y Print Growth are computed by sampling the centerlines of two alternating patterns timing borders respectively Print Growth is the X or Y print growth that has the larger absolute value In the AIM Specification or ISO 16022 a D value was introduced such that D 3 3 x PG The grade for Print Growth is A if ID lt 0 50 B if ID lt 0 70 C i
46. ct Note Once the hardware and software installation have been completed if communications fails with the MXi you may need to run a check of the serial port s to restore serial communications Refer to your PC owner s manual for guidance PC Requirements Pentium III processor 350 MHz or higher 128MB RAM 2GB hard disk Enhanced IDE SVGA display 800x600 w 256 colors Disk Space approximately 20MB free to install the software Windows 2000 or XP V2 1 0 Feb 2009 DMXx Verifier IM User Manual 1 3 Chapter Before You Begin Software Installation If you plan to install the 0300 board you must install the software prior to installing the board To install or upgrade to DMx Verifier v2 0 double click the setup exe icon in the DMx Verifier folder in the installation CD Reboot as required For upgrading there is no longer a need to uninstall any previous version prior to upgrading to the new version If you are upgrading from previous versions of DMx Verifier with a 0300 board already installed you only need to perform the Software Installation section to upgrade the software to version 2 0 When you need to install a new 0300 board please follow the Hardware Installation section after first installing the software Installing Hardware For first time installations you need to complete the software installation before installing the hardware Basic Setup Procedures The set up and installat
47. d including but not limited to implied warranties of merchantability and Technical support questions may be directed to helpdesk 9 microscan com Register your product with Microscan www microscan com register fitness for a particular purpose Microscan Systems Inc does not warrant that the functions contained in the product will meet any requirements or needs purchaser may have or that the product will operate error free or in an uninterrupted fashion or that any defects or errors in the product will be corrected or that the product is compatible with any particular machinery Limitation of Liability In no event shall Microscan Systems Inc be liable to you or any third party for any special incidental or consequential damages including without limitation indirect special punitive or exemplary damages for loss of business loss of profits business interruption or loss of business information whether in contract tort or otherwise even if Microscan Systems Inc has been advised of the possibility of such damages Microscan Systems Inc s aggregate liability with respect to its obligations under this warranty or otherwise with respect to the product and documentation or otherwise shall not exceed the amount paid by you for the product and documentation Some jurisdictions do not allow the exclusion or limitation of incidental or consequential damages or limitations on an implied warranty so the above limitation or exclusion may not appl
48. e Al Ex D F Jv Axial LInformity Grade Al E El D F Jw Print Growth Grade Al E D F v Error Corection Grade Al El D F w Distortion Angle Grade Al B E D F Set gt Log Header When you use Open List to open a list of images for verification if Set gt Log Data gt Log is checked two log files txt and prn will be created to save the verification results Both files contain the full verification results arranged in different format The txt file displays the results the same way as they appear in the DMx Window result box when Auto Check is performed The prn file 4 10 DMx Verifier User Manual V2 1 0 Feb 2009 Verifier Menu Descriptions tabulates the results that can be easily processed by other programs such as Microsoft Excel e If Log Header is checked the header is displayed in the prn file The header contains the name or title for each parameter field This is the default e Ifthe Log Header is unchecked no header will be shown in the prn file Set gt Log Data Delimiter The default Log Data Delimiter in the prn file is Tab You can change the delimiter to Comma Semi Colon Space or Tilde Set gt Log String When Log String is checked the Data Matrix decoded data will be added at the end of each record of the verification results in the prn file By default the decoded data is not included in the prn file Set gt Log Data Set gt Log Data gt Log e When Log is che
49. e Data Matrix such as Polarity Symbol Size Error Correction Level Image Style and Encoded Data String 2 2 DMx Verifier User Manual V2 1 0 Feb 2009 Description of Measured Parameters Description of Measured Parameters Nominal Cell or Module Size is referenced by all verification methods Nominal Cell Size is the average value of the two values N X Nominal Cell Size X Nominal Cell Size is the Data Matrix width in pixels divided by the number of columns e Y Nominal Cell Size Y Nominal Cell Size is the Data Matrix height in pixels divided by the number of rows o Z D gt o Although Nominal Cell Size is not a true print quality indicator it shows whether the image has sufficient resolution to achieve acceptable measurement accuracy and repeatability The minimum required is 5 pixels 10 pixels or more is recommended 2 rm E gt X a AIM Verification ISO 16022 For paper labels four parameters are measured and graded e Symbol Contrast e Axial Nonuniformity e Print Growth e Unused Error Correction The Overall Symbol Grade is the lowest of the parameter grades achieved from these four parameters Symbol Contrast SC Symbol Contrast is the difference in reflectance measured by grayscale values between the light and dark cells of the symbol The arithmetic mean of the darkest 10 of the pixels and that of the lightest 10 pixels within the Data Matrix area are
50. e current calibrated setup needs to be re calibrated The menu Enabled should be displayed for reporting the calibrated values however you have the option to report the non calibrated values as well by clicking Enabled to change it to Disabled If the calibration is disabled the contrast value reported depends on and varies with the lighting and the cell size is reported in pixels rounded to one decimal place If the calibration is enabled the contrast value reported is based on NIST traceable density scale and will not vary with lighting V2 1 0 Feb 2009 DMx Verifier User Manual 4 19 Chapter DMx Verifier Reference Guide and the cell size is reported in mil 1000th of an inch rounded to the nearest integer Before performing calibration you should have already determined the correct FOV of your camera setup and lighting based on the size and the surface marking reflectivity of the Data Matrix in your application Then you select File gt Live to display live images of one of the Data Matrix targets on the Microscan Calibration Test Card Choose the target that is about 1 3 to 1 2 of the FOV size It is important that the same target be used in both the Setup process and the Check process Calibration Setup 1 Select File gt Live Place a Data Matrix target of suitable size near the center of the FOV If necessary adjust the lighting the camera s f stop aperture or focus to obtain good images The images should not look t
51. e the software with the MXi Hand Held Reader Refer to Chapter 4 DMx Verifier Reference Guide for complete descriptions of all menu options and features DMx Verifier User Manual V2 1 0 Feb 2009 N CHAPTER 2 DMx Verifier Overview i os 0 o E o o x sO m This chapter provides an overview of the verification standards supported by the DMkx Verifier Introduction The DMx Verifier is a Windows based system that performs Data Matrix print or mark quality verification It provides a high level of validation of 2D Data Matrix code verifying that direct part marks or labels have been properly applied and are readable In addition to measuring and grading the Data Matrix quality based on current major marking or verification standards the DMx Verifier offers the unique and patented DPM verification method which reliably identifies any printing or marking problems and displays the marking errors in the Graphical User Interface GUI to enable the user to see and fix the errors DMx Verifier supports these verification or marking standards e AIM For print quality verification of paper labels the 2D Matrix Bar Code Print Quality Guideline was traditionally used which is described in the AIM Uniform Symbology Specification for Data Matrix released by AIM Association for Automatic Identification and Mobility in 1996 The document became ISO IEC 16022 Information technology Automatic
52. each of the four fixed patterns two solid borders and two alternating patterns or timing borders and its corresponding quiet zone and when present modules in or around the internal alignment patterns Up to five segments are individually graded and then the average grade is determined Finally the grade for Fixed Pattern Damage is chosen to be the lowest of the segment grades and the average grade There is no final value for Fixed Pattern Damage that corresponds to the grade for reporting Modulation Modulation is a measure of the uniformity of reflectance of the dark and light modules respectively First Modulation for each codeword is computed and graded based on the reflectance value of each module in the codeword Then the modulation grade is determined using codeword based modulation grades by applying an overlay procedure There is no final value for Modulation to report Print Growth Print Growth is measured the same way as in the AIM Verification but is not graded It is reported as an informative measure for the purposes of process control Scan Grade The scan grade for each scan or image is the lowest grade of all ISO 15415 parameters described in this section except for Print Growth Overall Grade The overall grade is the average of the scan grades for all images of the same mark DMx Verifier only takes one image and reports the overall grade Therefore the overall grade is the same as the scan grade DPM Veri
53. ecting scheme preferred for block damage recovery Convolutional code is a bit correcting scheme preferred for random damage recovery With the proper choice of Error Correction Code for a given environment a high rate of decoding can be achieved XL 2O 2 ge ea In Convolutional code as the ECC level increases data redundancy is added to the Data Matrix symbol as well as increased overhead OVHD in ECC 000 140 Additionally as the ECC levels increase the physical marked area increases proportionally The redundant data is randomly placed encoded inside the data storage area to increase the symbol s ability to recover from damage In Reed Solomon code the OVHD varies and is based on the size of matrix Refer to Table A 4 ECC 200 Symbol Attributes on page A 8 for more information V2 1 0 Feb 2009 DMx Verifier User Manual A 5 Appendix Data Matrix Symbology The examples as shown in Figure A 6 illustrate Data Matrices with different ECC levels and how ECC affects symbol density FIGURE A 6 Data Matrix Examples With Different ECC Levels os tas ee OS ER we ECC00 ECC50 ECC80 ECC100 ECC140 ECC200 Data 123456789 Format 1 Refer to Table A 1 for a correlation between ECC levels and required overhead TABLE A 1 Correlation Between ECC Levels amp Required Overhead Selected ECC Levels Required Overhead oo O 50 25 80 33 100 50 140 75 200 Various
54. egin Base Configuration e 0300 board e Camera Cables e DMx Verifier Software CD only e DMx Verifier License Key e DMx Verifier User Manual System Configuration Note Lighting is optional with the system configuration e 0300 board e Camera Cables e DMx Verifier Software CD only e DMx Verifier License Key e DMx Verifier User Manual e PC System including Windows 2000 or XP 15 VGA Monitor Keyboard amp Mouse e CM4000 Camera Kit including Camera with Stand 25mm Lens Extension Tube Set Cable 1 2 DMx Verifier User Manual V2 1 0 Feb 2009 Scanning Options The DMx Verifier is available with two scanning options m Scanning Options MVi Camera Light Imager optional 9 ku a o gt o Put e a 0300 Board Refer to the Camera I O 0300 Card User Manual on your CD MXi Reader You can configure the DMx Verifier with the MXi Hand Held Reader The MXi has a female 9 pin serial connector that plugs into the PC s serial port COM1 or COM2 The DMx Verifier establishes communications by detecting the correct COM port and baud rate used by the MXi The DMx Verifier auto detects baud rates from 9600 to 115200 default We recommend that the highest stable baud rate be used for optimum image uploading Refer to the MXi Reader User Manual for comprehensive installation setup and user information on this produ
55. elps you choose the appropriate lens using approximate dimensions For very precise measurements you may need to use a precision low distortion lens Contact Application Engineering 603 598 8400 for a recommendation that is specific to your measurement task o o o o lt D c o e S First determine the required horizontal field of view FY Use a dimension of 75 inches from the front of the camera to the first mounting hole as shown in Figure B3 Next measure the distance from the part to the first mounting hole on the camera D V2 1 0 Feb 2009 DMx Verifier TM User Manual B 3 Appendix Creating A Good Image FIGURE B 3 Determining Lens Selection First Mounting Hole 75 inches v gt Select a lens using the Lens Selection Chart The chart also indicates if you need an extension ring An extension ring decreases the distance from the lens to the part and causes a smaller FOV Illuminating the Part Proper illumination of the part is a critical factor influencing the effectiveness of the inspection operation There is no absolute procedure to follow however the following basic lighting concepts combined with some experimentation will help you create good lighting Note Never rely solely on ambient lighting Always use task lighting designed for your application B 4 DMx Verifier IM User Manual V2 1 0 Feb 2009 Illuminating the Part Light
56. er User Manual V2 1 0 Feb 2009 Verification Guidelines and Examples Symbol Contrast you should always perform the Contrast Calibration first For AIM IAQG ISO 15415 and DPM Symbol Contrast is computed similarly based on all the pixels in the Data Matrix area including the 1 X Quiet Zone N Axial Nonuniformity does not correlate well with the decodability In general marks with poor or failing Axial Nonuniformity grade are no more difficult to read than those with good Axial Nonuniformity grade for robust scanners Nevertheless it is a good idea to ensure good Axial Nonuniformity especially since most of the marking methods are capable of producing marks with good Axial Nonuniformity grade Axial Nonuniformity is computed and graded the same way for AIM ISO 15415 and DPM i os 5 o E o cs x sO m Print Growth indicates whether the symbol is underprinted or overprinted A mark with severe print growth or loss may become more difficult to read For AIM ISO 15415 Print Growth is measured based on the cells on the timing borders only In DPM all Data Matrix cells are used for computing Print Growth It is not unusual for a DPM mark to have different growth or loss between border cells and internal cells Therefore Print Growth in DPM is a more accurate representation of the mark growth or loss Unused Error Correction measures the damage or defects in a Data Matrix mark The grading is stable only if the e
57. erification results as shown in Figure 3 6 3 6 DMx Verifier User Manual V2 1 0 Feb 2009 Verifier Operations FIGURE 3 6 Verification Results 1 Yellow Plus 5 Red Pluses in Figure 3 9 in Figure 3 9 E DMx Data E X Nominal Cell Size 15 0 Center Offset 24 15 30 Size Offset A amp A 24 15 30 Cell Modulation B On 89 Off 92 Border Match A 100 Symbol Contrast 100 Axial Nonuniformity 4 0 00 Print Growth A X 0 Y 0 Unused Error Correction A 0 84 wrong cells 2 48 2 Red Pluses in Figure 3 5 Angle of Distortion 4 0 0 Overall Grade B DPM Status Good C29 to Oc o e gt o xo a Data Matrix Verifier Correlation Score Test In the main window the two cells in the ideal grid whose centers are marked with a red plus are two On cells that were incorrectly identified as Off cells They correspond to the Unused Error Correction of 0 84 and the two wrong cells displayed in the DMx Data window To view the wrong cells and their associated codewords in the main window left double click on the Unused Error Correction field in the DMx Data window to bring up the Unused Error Correction dialog box Uncheck ON Cells and check Wrong CodeWords FIGURE 3 7 Unused Error Correction Dialog Box Bl Unused Error Ce ON Cells OFF Cells v Wrong Cells esscasscoesedtresssadssassssunsecscstssesees V2 1 0 Feb 2009
58. f ID lt 0 85 D if ID lt 1 00 F if ID I 1 00 Unused Error Correction UEC A Data Matrix symbol has fixed error correction capacity When a Data Matrix is decoded the Error Correction used indicates how much of the error correction capability is consumed in order to decode the symbol The more the error 2 4 DMx Verifier User Manual V2 1 0 Feb 2009 Description of Measured Parameters correction is used the less Unused Error Correction is left within the error correction capacity The grade is N A if UEC gt 0 62 B if UEC gt 0 50 C if UEC gt 0 37 D if UEC gt 0 25 F if UEC lt 0 25 Overall Symbol Grade The Overall Symbol Grade is the lowest of the parameter grades achieved from Symbol Contrast Axial Nonuniformity Print Growth and Unused Error Correction i os 0 o E o 29 x Ae m IAQG Verification AS9132 Rev A For direct part marks dot peen marks in particular four parameters are measured and graded e Dot Size e Dot Center Offset e Angle of Distortion e Ovality The Overall Symbol Grade is the lowest of the parameter grades achieved from Dot Size Dot Center Offset Angle of Distortion and Ovality Module Fill and Symbol Contrast are displayed but not graded V2 1 0 Feb 2009 DMx Verifier User Manual 2 5 Chapter DMx Verifier Overview Dot Size No more than 2 of the total number of modules may contain dots that are outside the range
59. fication For direct part marks the most useful parameters for marking quality control are Center Offset Size Offset Cell Modulation and Print Growth To make DPM Verification flexible enough to meet various custom verification requirements additional complimentary parameters are taken from AIM and IAQG so that they can be measured at the same time A total of 10 parameters can be enabled for measuring and grading 2 10 DMx Verifier User Manual V2 1 0 Feb 2009 Description of Measured Parameters Center Offset CO Center Offset is a measure of the cell placement accuracy The parameter is computed based on all On Cells of the Data Matrix The On Cells are the cells having the same polarity or color as those on the two solid borders The Off Cells are the cells in the Data Matrix that are not the On Cells To measure Center Offset first the ideal Data Matrix grid with equally spaced cells in both axes is derived based on the outline of the Data Matrix symbol excluding the quiet zone Then the center of each cell in the ideal grid is determined The geometric center of each On cell is also determined The placement error for an On cell is the distance in pixels between the center of the On cell and its nearest center in the ideal grid Center Offset is the sum of the placement errors of all On cells divided by the nominal cell size then normalized to achieve the proper range between 0 and 10 Center Offset is non negative with
60. ge currently displayed in the main window as a BMP file File gt Print This menu item prints the image The measurement results will also be printed if Auto Check is successful File gt Job e Load gt Default Reset all configuration parameters to factory default settings Load Job Load a previously saved job that contains all configuration parameters This is useful for restoring previously configured parameters To view the loaded job name select File gt Jobs again e Save Save the current configuration parameters to a job file in the disk Delete Delete a job file from the disk Note We recommend although not required that all jobs be stored in the NDMx Verifiert jobs directory which is normally under C Program Files File gt Exit This menu item exits the program 4 4 DMx Verifier User Manual V2 1 0 Feb 2009 Verifier Menu Descriptions Set Menu FIGURE 4 3 Set Menu Set View ROI Center Offset Size Offset v Error Correction Grading Base Log Header Log Data Delimiter gt Log String Log Data gt Internal Sync Hardware Trigger n MXi Upload Mxi Compression gt MXi Auto Mode v o 0 i 5 O O i o o o0 25 xz zo Ao cc Set ROI By default the Region of Interest ROI is the full image You can set the ROI by selecting this menu item and then pressing and holding down the left mouse button and dragging the p
61. h no pause between images e f Auto mode is not selected the DMx Verifier will pause to let you examine the verification results of the current image and allow to you to get to the next image in the list by pressing the Space bar on the keyboard 4 2 DMx Verifier User Manual V2 1 0 Feb 2009 Verifier Menu Descriptions Note You can hold down the Ctrl or Shift key and left click the mouse button to select a file to be added into the file list FIGURE 4 2 Open List Dialog Box ixi Look in Ci hep 8 ex E3 SAMPLE1 BMP SAMPLE2 BMP SAMPLES BMP History Desktop I My Network P 0 0 i 5 o O io o O lt x o Ao co File name SAMPLE 1 BMP SAMPLE2 BMP SAMPLE Files of type Jal Files Cancel A File MXi If an MXi Hand Held Reader is connected to serial port COMI or COM2 of the PC selecting this menu item will allow the image captured in the MXi image buffer to be downloaded to the program and displayed File Grab This menu item is enabled only when the 0300 board is installed in the PC Selecting File Grab triggers the 0300 board to capture and display an image File gt Live This menu item is enabled only when the 0300 board is installed Selecting the menu allows live images to be displayed V2 1 0 Feb 2009 DMx Verifier User Manual 4 3 Chapter DMx Verifier Reference Guide File gt Save As This menu item saves the ima
62. he optical characteristics of the substrate and its response or reaction to the marking method must be improved in order to achieve more uniform cell reflectivity 2 18 DMx Verifier User Manual V2 1 0 Feb 2009 Verification Guidelines and Examples Examples of Data Matrix Verification The following examples illustrate the strengths and weaknesses of each verification method Typical dot peen and laser marks show how they are graded with these verification methods N IAQG IAQG is restrictive 1 A mark has to be near perfect to pass IAQG It also receives good grades with DPM i os gt gt i gt o x sO a FIGURE 2 1 Dot Center Offset Display of the Dot Peen Mark V2 1 0 Feb 2009 DMx Verifier TM User Manual 2 19 DMx Verifier Overview FIGURE 2 2 IAQG Results over 70 90 54 2 over 60 105 0 0 over 10 8 3 over 20 0 0 0 0 over 20 0 0 Module Fill x 92 Y 91 Symbol Contrast 78 Nominal Module Size 17 1 m Overall Grade 8511908097 IAQG Status Good FIGURE 2 3 DPM Results Nominal Cell Size A 17 1 Center Offset B 3 0 15 30 4 gt 30 0 Size Offset B 33 15 30 1 gt 30 0 Cell Modulation A On 94 Off 90 Border Match 100 Symbol Contrast A 78 Axial Nonuniformity 4 0 00 Print Growth A X 8 Y 9 Unused Error Correction amp 1 00 Angle of Distortion 4 0 0 Overall Grade
63. he part marked DMx Verifier helps the user to achieve the goal by identifying and displaying the problems so they can be understood and corrected System Setup To obtain accurate and repeatable verification results you need to ensure that e The Data Matrix image is not saturated e The Data Matrix background is uniform in the image e The Data Matrix part surface is perpendicular to the camera axis e Ifthe mark is not on a flat surface the plane formed by the four corners of the Data Matrix is perpendicular to the camera axis e The Data Matrix image is in focus Use a smaller aperture to increase the depth of focus e The nominal cell size of Data Matrix is at least 10 pixels in the image A value between 5 and 10 may be acceptable depending on the edge sharpness obtained These factors are less important e Contrast A lighter or darker image should yield similar quality measurements as long as the image is not saturated or too dark i e contrast less than 2096 e Position The Data Matrix in the image does not have to be centered as long as the lighting is uniform and no significant lens distortion is present Parameter Considerations General Parameters Symbol Contrast measurement will change in direct correlation with changing factors affecting image acquisition These factors include type of lens f stops used light source position and light intensity To obtain and report consistent 2 16 DMx Verifi
64. hesized aperture of 0 8 times the X dimension is used as the measuring aperture specified in the ISO 15415 document Other values from 4 to 20 can be entered if it is specified by the user application specification For example you can enter 5 for MIL STD 130 which specifies 05 to be used Whenever a non 4 8 DMx Verifier User Manual V2 1 0 Feb 2009 Verifier Menu Descriptions zero value is to be used the system must be calibrated first using Contrast Size Calibration The Verification Status is user configurable and determined by the parameter grade or the overall grade The verification status has the values Good Fair Poor and is displayed in the DMx Window along with Overall Grade For AIM ISO 15415 and IAQG the verification status is determined by the overall grade based on Status Configuration for the selected verification method By default the verification status is Good for the overall grade of A or B Fair for C or D and Poor for F Figure 4 8 shows the default status configuration for the IAQG method FIGURE 4 8 Default Status Configuration for IAQG IAQG Status Configuration Overall Grade Al c D Figure 4 9 shows the status configuration for ISO 15415 such that the grades A B and C correspond to Good D corresponds to Fair and F corresponds to Poor FIGURE 4 9 Status Configuration for ISO 15415 0 0 i 5 o O io o O 5 lt o Ao cc IS0 15415 S
65. ide FIGURE 4 28 Encode Data Matrix DataMatrix Data OK Control char format dnnn nnn decimal ASCII code ok Cancel Fr To enter a character that is shown on the keyboard simply type it in Or you can enter the same character using the format dnnn Where nnn is the decimal ASCII value of the character For example to encode the string Ab1 you can key in either Ab1 or d065 d098 d049 d035 The format dnnn is needed for entering ASCII characters that cannot be easily typed in from the keyboard Once you select OK after entering some data a new dialog box is displayed for you to enter the number of columns and rows of the Data Matrix If you prefer to have the encoding algorithm generate the smallest Data Matrix for you simply accept the default value of 0 and select OK You will be asked for Cell Width e g Grid size and Dot Size both in pixel units both default to 5 You can also force the Data Matrix to a certain size by entering the number of columns and rows yourself The value must be large enough to accommodate the data to be encoded Otherwise the message Not Valid Data will be displayed 4 26 DMx Verifier User Manual V2 1 0 Feb 2009 Verifier Menu Descriptions Help Menu FIGURE 4 29 Help Menu Help License Key About Help gt License Key The software would not run without a License Key attached to the parallel or USB port of the PC Help gt About This menu
66. if CM gt 70 D if CM gt 60 F if CM lt 60 Border Match BM Border Match is a measure of the quality of all four Data Matrix borders It is computed as the number of border cells with correct polarity divided by the total number of border cells When the border is perfect Border Match is 100 Border Match is a positive value that cannot exceed 100 It is graded as 2 12 DMx Verifier User Manual V2 1 0 Feb 2009 Description of Measured Parameters A if BM gt 95 B if BM gt 90 Cif BM gt 85 D if BM gt 80 F if BM lt 80 N Symbol Contrast SC Note The parameter is measured and graded according to the AIM specification i os o o E o ZS x sO m Symbol Contrast is the difference in reflectance measured by grayscale values between the light and dark cells of the symbol The arithmetic mean of the darkest 10 of the pixels and that of the lightest 10 pixels within the Data Matrix area are computed Symbol Contrast is the difference of the two means divided by the full gray scale range Note Symbol Contrast is sensitive to the lighting change thus an uncalibrated value has little meaning To use this parameter properly contrast calibration must be performed first It is graded as A if SC gt 75 B if SC gt 55 C if SC gt 40 D if SC gt 20 F if SC lt 20 Axial Nonuniformity AN Note The parameter is measured and graded according
67. ig og Red Plus O Ss o Xo O Red Plus Red Plus Similarly the Size Offset of 2 4 indicates a minor size offset problem There are two cells whose area are significantly different larger or smaller than the average cell area You can easily identify them by checking the display option Offset gt 30 in the Size Offset dialog box V2 1 0 Feb 2009 DMx Verifier TM User Manual 3 9 Chapter DMx Verifier Operations FIGURE 3 10 Data Matrix with Size Offset Problem Red Plus Red Plus TABLE 3 1 Mouse Action in DMx Data Window Action Field Result Center Offset Displays cells having various Center Offset errors Left Click Size Offset Displays cells having various Size Offset errors Error Correction Displays wrong cells and code words Center Offset Displays the options that allow you to choose what is Left Double Click Size Offset to be displayed in the main window Error Correction 3 10 DMx Verifier User Manual V2 1 0 Feb 2009 Verifier Operations Sample 3 Overprinted Data Matrix The Data Matrix in sample3 bmp has overprinted cells in addition to the problems presented in sample2 bmp The positive Print Growth values reflect this problem FIGURE 3 11 Data Matrix Image Overprinted Cells Go DMx Verifier Operations r V2 1 0 Feb 2009 DMx Verifier User Manual 3 11 Chapter DMx Verifier Operations The measurement re
68. infrared light that reduces the contrast and resolution found in an image b If you use fiber optics the part being illuminated is not heated If you use conventional bulbs the part being inspected may get hot Lasers A laser is an excellent source of light when you need to e Illuminate a small area e Create a structured lighting effect e Create a three dimensional simulation for example measure depth UJ Strobe Lights Use a strobe light when you need to freeze the image of a moving part Strobes provide a very short duration high intensity light In most cases you should use fiber optics to project the light to the required area Diffuse Versus Point Source Lighting Diffuse light as shown in Figure B 4 casts no shadows minimizes glare and appears to originate from no particular direction Most inspection applications work best with diffuse light xe oO G lt a 5 SE per oO pus eo V2 1 0 Feb 2009 DMx Verifier User Manual B 7 Appendix Creating A Good Image FIGURE B 4 Diffuse Light Fluorescent Bulb ALAIAIAIAIA Light Diffuser Good sources of diffuse light include e Fluorescent ring lights e Long fluorescent bulbs with or without diffusers Point source lighting as shown in Figure B 5 casts very strong shadows This is desired when the presence or absence of a shadow can reveal information about the pre
69. ing Considerations When it comes to lighting a part for vision analysis the following features should be considered when selecting a lighting scheme e Surface Characteristics Surface characteristics as they relate to light is a critical element when selecting the correct lighting type The type of surfaces listed below and their color must be considered before purchasing your illumination style Textured Reflective Diffuse Absorptive Color e Geometry The geometry may determine the direction of the illumination Will the complete item require illumination Size The size of the part will determine the size of the light e Region of Interest ROI How will the ROI compare to the rest of the part Types of Lighting With the advent of advances in lighting selecting an appropriate illumination type can be confusing Basic and Advanced Illuminations types will be discussed and their basic influences explained Diffused Point source lighting and polarizers also influence lighting Also the placement of the light source will affect you decision on lighting types For difficult lighting applications contacting a illumination authority would be suggested UJ o 97 i E e Basic Illumination o o o o lt D c o e S Fluorescent Incandescent Laser LED Light Emitting Diode V2 1 0 Feb 2009 DMx Verifier User Manual B 5 Append
70. int Growth is graded as A if PG lt 0 10 B if PG lt 0 20 C if PG lt 0 30 D if PG lt 0 40 F if PG gt 0 40 Unused Error Correction UEC Note The parameter is measured and graded according to the AIM specification A Data Matrix symbol has fixed error correction capacity When a Data Matrix is decoded the Error Correction used indicates how much of the error correction capability is consumed in order to decode the symbol The more the error correction is used the less Unused Error Correction is left within the error correction capacity The grade is A if UEC gt 0 62 B if UEC gt 0 50 C if UEC gt 0 37 D if UEC gt 0 25 F if UEC lt 0 25 2 14 DMx Verifier IM User Manual V2 1 0 Feb 2009 Verification Status Angle of Distortion AD N Note The parameter is measured according to the IAQG verification but graded differently Angle of Distortion is a measure of how much the L angle formed by the two solid borders deviates from the right angle Angle of Distortion is graded as A if IADI lt 2 B if lADI lt 4 Cif lADI lt 6 DiflADI lt 7 FiflADI 7 i os o o E o cs x sO m Overall Grade The Overall Grade is the lowest grade received by all enabled verification parameters By default all parameters except for Nominal Cell Size and Symbol Contrast are enabled Verification Status The Verification Status indicates Verification Pass Fail or
71. ion procedure for your DMx Verifier involves the following steps Unpacking the 0300 board and DMx Verifier software e Installing the 0300 board e Installing the Camera Power cable e Mounting the cameras e Connecting all cables and power e Installing the Software Protection Key also called Dongle to your PC s parallel or USB port General Location Considerations You can place the 0300 board in most environments without any concern for special enclosures or cabinets 1 4 DMx Verifier User Manual V2 1 0 Feb 2009 Consider the following when selecting your site u Installing Hardware Ensure that the camera cable is long enough to reach your PC Avoid severe vibrations Locate the components to avoid accidental bumping 9 ku a o gt o Put e a Protect your PC and components against dust humidity extreme temperatures and extremely harsh environments Environmental Requirements The environment of your PC is important for maintaining a reliable system You should consider the humidity temperature foot traffic and fresh air flow before permanently mounting your system Fan Performance 38 CFM minimum Typical Temperature Rise 6 0 C on every component on the 0300 board Recommended Tools You will need the tools listed below for the basic installation you may need additional tools for custom installations Small slotted screwdriver Small Phillips
72. is any need to move the camera For example you may be viewing different parts on one line and each part may require a different X horizontal Y vertical or Z in and out position Please refer to the Appendix B Creating A Good Image for more information The most common change is in the X and Y position A screw adjusted slide on the camera mount allows the best camera adjustment Clamping the Lens Any lens movement either by changing the focus or the f stop can seriously affect the verification results Ensure that the lens cannot move once it has been set The best method to inhibit movement is to clamp the lens as shown in Figure 1 4 This will ensure that the focus and f stop will not change and should also prevent mechanical stress from being transferred to the camera V2 1 0 Feb 2009 DMx Verifier User Manual 1 9 Chapter Before You Begin FIGURE 1 4 Lens Clamp e S E F O Lens Clamp Rebooting the System amp Starting DMx Verifier Prior to launching the DMx Verifier software 1 Make sure the Software Protection Key also referred to as the License Key or Dongle is securely attached to the PC s parallel or USB port 2 Select Start gt Program Files gt DMx Verifier 1 10 DMx Verifier User Manual V2 1 0 Feb 2009 uml Installing Hardware If the MXi Hand Held Reader has been physically connected to the PC it will beep several ti
73. istics of the code consist of 1 Encodable character set a Values 0 127 in accordance with ANSI X3 4 i e all 128 ASCII characters equivalent to the US national version of ISO 646 b Values 128 255 in accordance with ISO 8859 1 Latin Alphabet No 1 These are referred to as extended ASCII 2 Representation of data A dark module is a binary 1 and a light module is a binary O In a reversed image reverse polarity a light module is a binary 1 and a dark module is a binary O 3 Symbol size in modules not including the quiet zone V2 1 0 Feb 2009 DMx Verifier TM User Manual A 9 gt XL 2O ge ea Appendix Data Matrix Symbology ECC 000 140 9 by 9 to 49 by 49 Odd only ECC 200 10 by 10 to 144 by 144 Even only Note Refer to Table A 4 ECC 200 Symbol Attributes on page A 8 for more information Data characters per symbol refers to maximum symbol size in ECC 200 Alphanumeric data up to 2335 characters 8 bit byte data 1556 characters Numeric data 3116 digits Selectable error correction ECC 000 140 Four levels of convolutional error correction plus the option to apply only error detection ECC 200 Reed Solomon error correction Code type Matrix Orientation independence Yes Summary of Additional Features The following summarizes additional Data Matrix features including whether inherent to the Data Matrix or optional Reflectance revers
74. item displays the software version o 0 i 5 O O i o o o0 25 xz zo Ao rm V2 1 0 Feb 2009 DMx Verifier User Manual 4 27 Chapter DMx Verifier Reference Guide 4 28 DMx Verifier User Manual V2 1 0 Feb 2009 appennxa Data Matrix Symbology This appendix describes the Data Matrix Symbology Data Matrix Certification Data Matrix has been certified by AIM USA and AIM International as a fully public domain symbology AIM stands for Automatic Identification Manufacturers International Inc It is located on the Internet at http www aimi org bib4 htm which provides the complete specification gt Data Matrix has also been selected as a standard for 2D marking by a majority of industry organizations such as SEMI Standard T2 Electronics Industries Association EIA and Automotive Industry Action Group AIAG XL gt E ge an What Is Data Matrix The Data Matrix is a unique machine readable symbol capable of storing a large amount of information within a small physical size Examples are shown in Figure A 1 V2 1 0 Feb 2009 DMx Verifier User Manual A 1 Appendix Data Matrix Symbology FIGURE A 1 Data Matrix Examples vy to ee de g The Data Matrix symbology allows for two dimensional encoding and decoding For the first time users are no longer constrained by the limitations of a printed symbol Now with the Data Matrix symbology users have the a
75. ity 4 0 00 Print Growth A X 5 7 2 Unused Error Correction amp 1 00 Angle of Distortion A 0 0 Center Offset Size Offset Cell Modulation Border Match Symbol Contrast Axial Nonuniformity Print Growth Unused Error Correction Angle of Distortion Overall Grade 260604011758571 Nominal Cell Size Center Offset Size Offset Cell Modulation Border Match ry our Symbol Contrast Axial Nonuniformity Print Growth Unused Error Correction C A Angle of Distortion A Overall Grade D 260604011918391 C DPM Status Fair 13 3 0 8 15 30 0 gt 30 0 30 15 30z 1 p 30 0 On 95 Off 69 100 62 0 00 X 4 Y 2 0 60 wrong cells 2 0 0 DPM Status Fair EA 13 3 06 15 30z 0 gt 30 40 15 30z 4 gt 3022 0 On 95 Off 66 100 57 0 00 x 7 Y 1 0 40 wrong cells 5 1 0 DPM Status Fair 2 34 DMx Verifier User Manual V2 1 0 Feb 2009 Verification Guidelines and Examples UEC is stable with hard damage UEC is stable for hard damage caused by damaged or missing cells In this case DPM usually has the same UEC value and grade NO FIGURE 2 26 Unused Error Correction Display of the Laser Mark i os gt gt i gt o x sO a FIGURE 2 27 DPM Results Nominal Cell Size 143 Center Offset 4 amp 4 25 15 30 2 gt 30 2 1 Size
76. ix Creating A Good Image Strobe Accessories Fiber Optics Diffusers Beam Splitters e Advanced Illumination DOAL CDI SCDI Fluorescent Versus Incandescent Lighting Preference for using fluorescent lighting as presented in Table B 1 or incandescent lighting as presented in Table B 2 depends on several factors However the general rule should be to use fluorescent lighting whenever possible TABLE B 1 Fluorescent Lighting Positive Features Negative Features Diffuse Flickering light Usually easy to mount Lack of intensity Long life Light output decays with age Inexpensive Creates little heat Note Fluorescent lighting tends to be diffuse and not concentrated on a part If the part is being magnified by a lens or if the lens aperture is small stopped down you may find the light level insufficient B 6 DMx Verifier User Manual V2 1 0 Feb 2009 Illuminating the Part TABLE B 2 Incandescent Lighting Positive Features Negative Features High intensity Shorter life than fluorescent Inexpensive if you use home light Expensive if fiber optic lights are used bulbs No flicker Source of infrared light Light output constant over life of Creates excessive of heat bulb a It is usually necessary to place an infrared filter in front of the camera lens when using an incandescent light source The camera has a high sensitivity to
77. ix image Pre Process gt Close This is equivalent to Dilate followed by Erode Use this to remove small dark colored defects in a Data Matrix image 4 18 DMx Verifier User Manual V2 1 0 Feb 2009 Verifier Menu Descriptions Tools Menu FIGURE 4 20 Tools Menu Tools Help Auto Check F5 Contrast Size Calibration Target ROI Encode Data Matrix Tools gt Auto Check This menu item performs Data Matrix verification calculations based on the verification mode configured in the Set gt Grading Base dialog box Ifthe verification is successful the verification results will be displayed in the DMx Data window with additional Data Matrix properties available for display in the DMx Property window If the verification is not successful the message No Measurement Possible will be displayed in the status panel Tools gt Contrast Size Calibration FIGURE 4 21 Contrast Size Calibration 0 9 i 5 o O io o O 5 lt x o Ao cc Contrast Size Calibration Setup Check Enabled Target ROI The DMx Verifier system must be calibrated in order to report the cell module size in mil 1 1000th of an inch and the contrast as a NIST traceable value The Setup menu allows you to calibrate the camera system using the Microscan Calibration Test Card Once the system is calibrated you should not change the camera s FOV focus aperture or lighting The Check menu allows you to determine if th
78. le names for uploaded images by appending two digits to the filename you entered The two digits start from 00 and end with 99 For example if you enter file name as my test Verifier will save the images as my testO0 bmp my testO1 bmp and so on When the last two digits reach 99 after saving 100 files you need to move the image files so that they will not be replaced with newly uploaded image files Auto Check This option is grayed out if Auto Upload is unchecked When Auto Upload is checked you can further check Auto Check so the Verifier will perform the Auto Check operation upon receiving the uploaded image If the Auto Check operation is successful the results will be displayed in the DMx Data window when Auto Send option is not checked Auto Send This option is available only when both Auto Upload and Auto Check are checked By checking Auto Send the results from Auto Check will be sent as if they were entered from the PC s keyboard This can allow the verification results to be sent directly to a Windows program such as Microsoft Excel that has the window focus 4 14 DMx Verifier User Manual V2 1 0 Feb 2009 Verifier Menu Descriptions View Menu FIGURE 4 15 View Menu View Pre Process Too DMx Property DMx Data Threshold Display Contrast Display Undo Zoom Solid Grid Lite Grid Camera Mx string M i ID Form MXi Header View gt DMx Proper
79. lete details e Captured When this option is checked the image captured by MXi in full resolution 640x480 is uploaded from the MXi to the Verifier when you select File MXi e Decoded When this option is checked if the Data Matrix is decoded by the MXi then only a small portion of the image containing the Data Matrix area is uploaded to the Verifier If no Data Matrix is decoded then the full image 640x480 is uploaded e Frozen When this option is checked the image captured to the Frozen buffer is uploaded to the Verifier Note The MXi can be set to transfer the captured image to the Frozen buffer with FREEZE command Downloaded When this option is checked the image in the MXi Downloaded buffer is uploaded to the Verifier Note The MXi Downloaded buffer is used for storing the image that is downloaded to MXi from an image file 4 12 DMx Verifier User Manual V2 1 0 Feb 2009 Verifier Menu Descriptions Set gt MXi Compression FIGURE 4 13 MXi Compression This menu item is visible when MXi is connected to the PC s serial port When MXi Compression is set to None the image captured by MXi is uploaded to the Verifier without being compressed When other compression ratios are selected the MXi compresses the image and upload it to the Verifier using less time The default compression ratio is 8 1 The higher the compression ratio the faster the uploading process and
80. mes in succession to confirm OK The User Info dialog box will be displayed as shown in Figure 1 5 Note This must be completed before you can run the software 9 ku a o gt o Put e _ m FIGURE 1 5 User Info Dialog Box x User ID initials EL Engine Plant 1 Mxi Serial 151100334P Do not show this form next time Note This dialog box is only displayed when the MXi Hand Held Reader is properly connected to the PC running the DMx Verifier 3 Type in the applicable information for User ID Your initials Location Physical location PC name etc MXi Serial This information is affixed to your MXi unit We recommend that you leave the following box unchecked Do not show this form next time 4 Click OK when done V2 1 0 Feb 2009 DMx Verifier User Manual 1 11 Chapter Before You Begin You Are Done At this point you have performed the hardware installation and setup provided in this chapter and supplemented in the MXi Hand Held Reader User Manual You have also performed the software installation of the DMx Verifier Software Protection Key Dongle and 0300 driver You are ready to use the software Consult Chapter 2 DMx Verifier Overview for detailed information on technical terminology and concepts related to the DMx Verifier verification measurements Use Chapter 3 DMx Verifier Operations as a guide to operat
81. n does not exceed 3 5 B if angular deviation does not exceed 7 0 F if angular deviation exceed 7 0 Ovality No more than 2 of the total number of modules may have ovality exceeding 20 of the nominal module size Ovality is graded as i os 0 o E o cs x sO m B if no more than 2 is outside the range of 20 F if more than 2 is outside the range of 20 Module Fill Module Fill is computed in both X and Y directions X Module Fill is the average module width divided by X Nominal Module Size Y Module Fill is the average module height divided by Y Nominal Module Size Module Fill is not a graded parameter and is provided for reference only Symbol Contrast Symbol Contrast is defined as the gray density difference between the marking and its substrate For image based contrast measurement the camera system first must be calibrated to match the Scale of Gray Density chart shown in AS9132 The contrast is then measured as the difference in reflectance measured by grayscale values between the light and dark modules of the symbol The arithmetic mean of the darkest 10 of the pixels and that of the lightest 10 pixels within the Data Matrix area are computed Symbol Contrast is the difference of the two means divided by the full gray scale range Overall Grade The Overall Grade is the lowest of the parameter grades achieved from Dot Size Dot Center Offset Angle of Distortion and Ovality ISO 15415 Verification
82. ne dimensions as shown in Figure B 8 FIGURE B 8 Back Lighting Polarized Light Polarized light helps reduce glare on an object when the glare interferes with a visual inspection such as when attempting to read a label To polarize light place polarizing material over the light source as shown in Figure B 9 Another piece of polarizing material an analyzer is placed in front of the camera lens and rotated until the glare or mirror like reflection is minimized B 10 DMx Verifier User Manual V2 1 0 Feb 2009 Advanced Lighting FIGURE B 9 Polarized Light Polarizer LLL 7 T TBI Analyzer For some applications glare may be helpful and you would not want to eliminate it For example a hole in an object may be more easily seen on a surface that has glare In all cases you will want to adjust the rotation of the polarizing material to maximize the image contrast of the features you wish to inspect Advanced Lighting Northeast Robotics Inc is a recognized leading provider of lighting systems designed specifically for machine vision applications These products allow machine vision systems to perform reliably in difficult imaging applications involving highly reflective or uneven surfaces NER is the inventor of UJ e DOAL Diffused On Axis Lighting Refer to DOAL on page B
83. ntify the desired features and characteristics Refer to Table B 3 for additional lighting information B 16 DMx Verifier User Manual V2 1 0 Feb 2009 Lighting Tips TABLE B 3 Additional Lighting Information Lighting Type Hardware Required EVEN FRONT DIFFUSED Representative Applications Band Fluorescent Tube Straight or Simplest general purpose lighting Circular Always try this first Zone Diffuser Plate or Reflecting Panel Detect broken microscope slides DOAL CDI SCDI POINT FRONT Point Source Use where high intensity lighting is Fiberlight or Incandescent DOAL required on small area Also for CDI shadow fill in and general lighting SCDI touch up Multiple Point Multiple Fiberlights or Symmerical high intensity Sources Incandescents illumination of microscopic fields DOAL of view such as electronic CDI components SCDI EVEN BACK Backlighting Light Box or Uniform Surface Dimensioning highly reflective parts inspecting contours of parts with highly variable surfaces STRUCTURED On Axis DOAL See flat dark reflective surfaces Beam Splitter Front light deep holes Light Line Laser with Cylinder Lens Relative height measurements of surfaces Non contact gaging SPECIAL EFFECTS Polarizing Polarizing on Light Sources and Lens Minimize glare and variable glints on top lit reflective surfaces Color Interference and Gelatin Filters Discrimin
84. of 60 to 105 of the nominal module size Dot Size is graded as A if no more than 2 is outside the range of 70 to 90 B if no more than 2 is outside the range of 60 to 105 F if more than 2 is outside the range of 60 to 105 To visualize the Dot Size error the DMx Verifier marks e Green Modules with Dot Size within the range of 70 and 90 e Yellow Modules with Dot Size outside the range of 70 and 90 but within the range of 6096 to 10596 Red Modules with Dot Size outside the range of 6096 and 10596 Dot Center Offset No more than 2 of the total number of modules may contain dots whose dot center offset exceeds 2096 of the nominal module size Dot Center Offset is graded as A if no more than 2 is outside the range of 10 B if no more than 2 is outside the range of 20 F if more than 2 is outside the range of 20 To visualize the Dot Center Offset error the DMx Verifier marks e Green Modules with Dot Center Offset within the range of 10 e Yellow Modules with Dot Center Offset outside the range of 10 but but within the range of 2096 e Red Modules with Dot Center Offset outside the range of 20 2 6 DMx Verifier User Manual V2 1 0 Feb 2009 Description of Measured Parameters Angle of Distortion Angle of Distortion requires that angular deviation of 90 degree axes between row and column shall not exceed 7 Angle of Distortion is graded as N A if angular deviatio
85. ointer across the desired area The ROI can specify the Data Matrix to verify when there is more than one Data Matrix in the image V2 1 0 Feb 2009 DMx Verifier TM User Manual 4 5 Chapter DMx Verifier Reference Guide Set gt Center Offset FIGURE 4 4 Center Offset Dialog Box x v Offset lt 15 v Offset 15 30 This menu item is enabled when DPM or IAQG is chosen in the Grading Base dialog box and an ECC200 Data Matrix is successfully verified For DPM you have the option to highlight the Data Matrix cells that have cell placement error less than 15 between 15 and 30 and or greater than 30 of the nominal cell size respectively For IAQG the corresponding ranges are less than 10 between 10 and 20 and greater than 20 respectively Set gt Size Offset FIGURE 4 5 Size Offset Dialog Box Size Offset IV Offset 15 IV Offset 15 30 This menu item is enabled when DPM or IAQG is chosen in the Grading Base dialog box and an ECC200 Data Matrix is successfully verified For DPM you have the option to highlight the cells of an ECC200 Data Matrix that have variation error less than 15 between 15 and 30 and or greater than 30 of the average cell area respectively For IAQG the corresponding ranges are less than 10 between 10 and 20 and greater than 20 respectively 4 6 DMx Verifier User Manual V2 1 0 Feb 2009 Verifier Menu Descriptions Set Err
86. ons 1 3 Installing internal camera power cable 1 6 Internal cabling 1 6 camera power cable installing 1 6 ISO 15415 parameters 2 18 standard 2 2 verification 2 7 Index 2 DMx Verifier User Manual V2 1 0 Feb 2009 L Laser Lighting B 7 Lens 35mm B 2 aperture B 15 chart B 2 B 3 distance B 4 extension ring B 4 focallength B 2 focus 1 9 f stop B 15 selection B 2 selection chart B 2 Lighting back B 10 CDI B 13 continuous diffuse illumination B 13 diffused on axis B 12 DOAL B 12 factors B 4 fluorescent B 6 for flat specular surfaces B 12 for very uneven specular surfaces B 13 front B 9 incandescent B 6 laser B 7 placement B 9 point source B 7 polarized B 10 SCDI B 14 side B 9 square continuous diffuse illumination B 14 strobe B 7 tips B 16 uneven specular surfaces B 14 Location Considerations 1 4 M Menus file 4 2 help 4 27 pre process 4 18 set 4 5 tools 4 19 view 4 15 Modulation 2 10 Index Module Fill 2 7 MXi interface 3 1 N Nominal Cell Size 2 3 3 4 0 Offset center 2 18 size 2 18 Ovality 2 7 Overall grade 2 7 2 10 2 15 3 5 symbol grade 2 5 OVHD A 5 P Parameter Considerations 2 16 Point Source Lighting B 7 Polarized Light B 10 Pre Process Menu 4 18 Print Growth 2 4 2 10 2 14 2 17 3 5 Printing data to a file 3 17 image only 3 17 image with verification results 3 17 Q Quiet Zone A 4 R Rectangular Symbols A 11 Reference Decode 2 8 Reflectance re
87. oo dark or saturated i e the value of light pixels should not reach 255 Select File gt Live to exit the live video mode and capture an image FIGURE 4 22 Black and White Data Matix Label Step 1 4 20 DMx Verifier User Manual V2 1 0 Feb 2009 Verifier Menu Descriptions 2 Select Tool Contrast Size Calibration and then select Setup The Enter Contrast of Data Matrix Calibration Target dialog box is displayed as shown in Figure 4 23 FIGURE 4 23 Enter Contrast of Data Matrix Calibration Target Dialog Box DMx erifier E x Enter Contrast of Data Matrix Calibration Target Cancel 3 Enter the contrast of the target shown on the Microscan Calibration Test Card Press OK If the calibration is successful the following message will be displayed in the Status bar Calibration succeeded and enabled 0 9 i 5 o O io o O 25 lt o Ao cc You can verify that Calibration Mode is now enabled by selecting Tools gt Contrast Size Calibration to see that Enabled is displayed If the calibration is unsuccessful then one of the following messages will be displayed instead A Calibration failed No Data Matrix found Calibration failed Invalid calibration target Calibration failed Adjust image Calibration Check For a calibrated system you can check to see if it has changed from the last calibrated state such that it may require re calibration
88. or Correction FIGURE 4 6 Error Correction Dialog Box gl Unused Error v ON Cells OFF Cells v Wrong Cells This menu item is enabled when DPM is chosen in the Grading Base dialog box and an ECC200 Data Matrix is successfully verified You have the options to highlight On cells Off cells Wrong cells if any and the corresponding wrong code words 0 9 i 5 o O io o O 25 xz zo Ao cc V2 1 0 Feb 2009 DMx Verifier User Manual 4 7 Chapter DMx Verifier Reference Guide Set Grading Base FIGURE 4 7 Grading Base Dialog Box ii Grading Base m Mode DPM C AIM C IAQG C 1501 m Status Color Key Advanced Distortion Angle Grade DPM Status Configuration Cell Size Grade Center Offset Grade Size Offset Grade Cell Modulation Grade 5415 Border Match Grade Good Fair Axial Uniformity Grade Poor Print Growth Grade Error Correction Grade Use the dialog box to set the verification method to DPM AIM IAQG or ISO 15415 When DPM is selected and Print Growth Grade is checked in DPM Status Configuration clicking Advanced button will display a new dialog for you to enter new Ideal or Target Print Growth TGP For more information on TGP see Print Growth PG on page 2 14 When ISO 15415 is selected clicking Advanced button will display a new dialog for you to enter Aperture Size The default Aperture Size of 0 means a synt
89. ormity 4 0 00 Print Growth BX Unused Error Correction 4 1 A BD Angle of Distortion Overall Grade AOOOBSMX V2 1 0 Feb 2009 DMx Verifier User Manual 2 27 Chapter DMx Verifier Overview 2 Another good dot peen mark gets the grade B with DPM FIGURE 2 15 Unused Error Correction Display of the Dot Peen Mark Um FIGURE 2 16 DPM Results Nominal Cell Size 17 2 Center Offset 12 15 30 0 gt 30 0 Size Offset B 38 15 30 3 gt 30 0 Cell Modulation B On 92 Off 83 Border Match 100 Symbol Contrast 63 Axial Nonuniformity 4 0 00 Print Growth BX 14 Y 12 Unused Error Correction 1 00 Angle of Distortion 1 0 Overall Grade B DPM Status Good AOOOESMx 2 28 DMx Verifier User Manual V2 1 0 Feb 2009 Verification Guidelines and Examples 3 A good laser mark gets the grade B with DPM FIGURE 2 17 Unused Error Correction Display of the Laser Mark N i os gt gt i gt o x sO a FIGURE 2 18 DPM Results Nominal Cell Size 16 6 Center Offset 15 15 30 3 gt 30 0 Size Offset B 3 2 15 30 3 p 30 2 Cell Modulation B On 84 Off 85 Border Match 100 Symbol Contrast B 62 Axial Nonuniformity 4 0 00 Print Growth B X 2 Y 11 Unused Error Correction amp 1 00 Angle of Distortion 1 0 Overall Grade B DPM Status Good T 3482 N 00253 V2 1 0 Feb 20
90. ot Size Offset smaller percentages of modules over 70 90 and 60 105 DPM reflects these changes in Center Offset and Size Offset NO FIGURE 2 7 Dot Center Offset Display of the Dot Peen Mark i os D gt i gt o x sO a FIGURE 2 8 IAQG Results Dot Size B over 70 90 2 1 over 60 105 0 7 Dot Center Offset F over 10 20 1 over 20 9 7 Angle of Distortion A 1 0 Ovality B over 20 0 7 Module Fill A 82 Y 86 Symbol Contrast 73 Nominal Module Size 17 0 Overall Grade F J4QG Status Poor 8513109225 V2 1 0 Feb 2009 DMx Verifier TM User Manual 2 23 Chapter DMx Verifier Overview FIGURE 2 9 DPM Results Nominal Cell Size 17 0 Center Offset 5 6 15 30 21 gt 30 1 Size Offset 33 15 30 4 gt 30 1 Cell Modulation On 89 Off 94 Border Match 100 Symbol Contrast 73 Axial Nonuniformity 0 00 Print Growth x 18 Y 14 Unused Error Correction 1 00 Angle of Distortion 1 0 Overall Grade DPM Status Fair 8513109225 2 24 DMx Verifier User Manual V2 1 0 Feb 2009 Verification Guidelines and Examples 4 Another example of a typical good dot peen mark that fails IAQG receives suitable grade B due to moderate cell misplacement according to DPM NO FIGURE 2 10 Dot Center Offset Display of the Dot Peen Mark i os gt gt i gt o x sO a FI
91. ppear on the printed page You can describe the physical Data Matrix mark how the image was captured etc oO N c 2 S i Q o 4 Select OK to print the results The verification results also include the data displayed in the DMx Properties window E r9 E gt X a Printing the Data to a File 1 To display the Print window follow the instructions in Printing the Verification Results Only on page 3 16 2 Inside the Printer group enable the Print to File option and then select OK The Save Log As box will be displayed which allows you to enter the file name for storing the data If the file already exists the data will be appended to the end of the file Printing the Image with Verification Results In the main application window select File gt Print to print the image and the verification data Printing the Image Only After opening a new image and before performing Auto Check select File gt Print to print the image V2 1 0 Feb 2009 DMx Verifier TM User Manual 3 17 Chapter DMx Verifier Operations 3 18 DMx Verifier User Manual V2 1 0 Feb 2009 cuaptena DMx Verifier Reference Guide This chapter provides a complete reference guide for DMx Verifier operation It explains the menu selections toolbar buttons dialog boxes and image windows provided in this product Verifier Menu Descriptions This section describes the following menus
92. rrors are caused by hard damage where damaged cells are either very dark or very light Cells with marginal grayscale values neither dark nor light may or may not consume error correction This can cause a mark to have varying UEC grades even though the images of the mark have not changed much In general marks having poor UEC grades are bad marks but it is possible that bad marks can get a good UEC grade Modulation is a robust parameter that can help identify bad marks with good UEC grade IAQG AS9132 Parameters Dot Size and Dot Center Offset in IAQG are similar to Size Offset and Center Offset in DPM verification respectively Typically the passing grade B in IAQG corresponds to Good grades A or B in DPM There are many reasonable marks that earn a Fair grade C or D in DPM but would fail IAQG Therefore IAQG is very restrictive for dot peen marks IAQG does not measure the uniformity of reflectance of the dark and light cells or modules This may not be a serious problem for dot peen marks but can allow poor laser or chemical etched marks to pass IAQG V2 1 0 Feb 2009 DMx Verifier User Manual 2 17 Chapter DMx Verifier Overview ISO 15415 Parameters ISO 15415 verification relies on a single Modulation or Cell Modulation parameter to detect a number of problems such as print growth or loss cell misplacement reflectivity of the substrate uneven printing etc Since a low Cell Modulation grade can be caused b
93. s My Computer to Oc o te gt o X o Eo a E File name test iis Y My Network P Save as type Text File t t Y Cancel A 7 Enter comments to be included in the log file if desired and select OK 8 All images in the list are verified one by one and results saved into two log file TEST LIST TXT and TEST LIST PRN V2 1 0 Feb 2009 DMx Verifier TM User Manual 3 15 Chapter DMx Verifier Operations Verification Results Reporting Printing the Verification Results Only 1 From the DMx Data window select File gt Print to print the data only The Print window will be displayed as shown in Figure 3 16 FIGURE 3 16 Print Window General m Select Printer Add Printer Microsoft Microsoft Office Doc Office Li Status Ready Location US NASA Comment HP 5100tn Engineering r Page Range AJ Number of copies fi E C Selection Current Page fs Pages V Collate el gi Cancel 2 Select Print to display the DMx Comments window From here you can enter some comments that will also appear on the printed page You can describe the physical Data Matrix sample how the image was captured etc 3 16 DMx Verifier User Manual V2 1 0 Feb 2009 Verification Results Reporting FIGURE 3 17 Data Matrix Comments Window DMx Verifier x Comment Cancel 3 Enter some comments that will also a
94. s tends to look like a rectangular Data Matrix if Axial Nonuniformity is significant Axial Nonuniformity is graded as N A if AN lt 0 06 B if AN lt 0 08 Cif AN lt 0 10 Dif AN lt 0 12 F if AN gt 0 12 o Z D gt o Grid Nonuniformity GN Grid Nonuniformity measures and grades the largest vector deviation of the grid intersections from their ideal theoretical position The grid intersections are determined by the reference decode algorithm from the binarized image of the Data Matrix from the cells within the alternating patterns only Grid Nonuniformity is graded as 2 rm E gt X a A if GN lt 0 38 B if GN lt 0 50 C if GN 0 63 Dif GN lt 0 75 Fif GN 0 75 Unused Error Correction UEC Note The parameter is measured and graded according to the AIM specification A Data Matrix symbol has fixed error correction capacity When a Data Matrix is decoded the Error Correction used indicates how much of the error correction capability is consumed in order to decode the symbol The more the error correction is used the less Unused Error Correction is left within the error correction capacity The grade is A if UEC 0 62 B if UEC gt 0 50 C if UEC gt 0 37 D if UEC gt 0 25 F if UEC 0 25 V2 1 0 Feb 2009 DMx Verifier TM User Manual 2 9 Chapter DMx Verifier Overview Fixed Pattern Damage Fixed Pattern Damage is measured based on modules in
95. scale value e 4o Border Match is 100 and has the grade A This value tells there is no border damage e 4o Contrast is 100 and was not enabled for grading 3 4 DMx Verifier User Manual V2 1 0 Feb 2009 Verifier Operations e Axial Uniformity is 0 and has the grade A e Print Growth is 0 in X direction and 0 in Y direction and has the grade A Unused Error Correction is the maximum value of 1 00 and has the grade A Angle of Distortion is 0 0 and has the grade A GO e Overall Grade is A which is the lowest grade of all enabled parameters in the Grading Base box The status for DPM verification is Good You can display other Data Matrix properties from the View gt DMx Property menu item as shown in Figure 3 4 FIGURE 3 4 DMx Property Dialog Box DMx Property x Dark on Light Number of Rows 24 Number of Cols 24 ECC Level ECC 200 Image Style Normal to Oc o e gt o xo a V2 1 0 Feb 2009 DMx Verifier TM User Manual 3 5 Chapter DMx Verifier Operations Sample 2 Data Matrix with Errors The Data Matrix in sample2 bmp Figure 3 5 contains cells that have center Offset or size offset errors Open sample2 bmp then select Auto Check By default the graphic representation of error correction is displayed in the main window FIGURE 3 5 Data Matrix With Error Correction Used Red Plus Red Plus The DMx Data window displays the v
96. sence of depth Points sources are effective for revealing surface defects FIGURE B 5 Point Source Light Good point source lights include e Incandescent spot lights Fiber optic sources DMx Verifier User Manual V2 1 0 Feb 2009 Illuminating the Part e Unfrosted incandescent light bulbs e Strobe lights Placement of Light Sources There are three basic light source positions front side and back Front Lighting Front lighting is good for the inspection of flat two dimensional surface features such as a label as shown in Figure B 6 FIGURE B 6 Front Lighting Exp 1FEB95 65590AF21 Lot 02 7250 8 R12 Store below 77 F 25 C Side Lighting Dark Field Side lighting helps to highlight three dimensional features and surface imperfections and reveals subtle details as shown in Figure B 7 UJ FIGURE B 7 Side Lighting o 97 c E o o o o lt D c o e S V2 1 0 Feb 2009 DMx Verifier TM User Manual B 9 Appendix Creating A Good Image Back Lighting Back lighting helps in the inspection of silhouettes for example the outer edges of a part It enhances the contrast between the part and the background Think of contrast as the gray scale difference between two areas Back lighting is helpful in the inspection of holes cutouts and outli
97. sults are FIGURE 3 12 Data Matrix Image Measurement Results amp DMx Data x File Nominal Cell Size 15 0 Center Offset B26 15 30 2 gt 30 4 Size Offset B 2 15 30z 20 gt 30 2 Cell Modulation B On 96 Off 82 Border Match 4 100 Symbol Contrast 100 Axial Nonuniformity 4 0 00 Print Growth C X 25Z Y 25 Unused Error Correction amp 0 75 wrong cells 3 Angle of Distortion 4 0 0 Overall Grade C DPM Status Fair Data Matrix Verifier Correlation Score Test The Center Offset and Size Offset remain virtually unchanged but Print Growth has worsened to 25 in both horizontal and vertical directions This means the width and height of On cells are on average 25 greater than Nominal Cell Size 3 12 DMx Verifier User Manual V2 1 0 Feb 2009 Verifier Operations Sample 4 Underprinted Data Matrix The Data Matrix in sample4 bmp is severely underprinted and has negative print growth values Figure 3 13 displays the main window with center offset error FIGURE 3 13 Data Matrix Image Center Offset Error ce SuolleJedoO J9UNHe9A XING The DMx window shows the measurement results as shown in Figure 3 14 3 13 DMx Verifier User Manual V2 1 0 Feb 2009 Chapter DMx Verifier Operations FIGURE 3 14 Data Matrix Image Underprinted Label EI x File Nominal Cell Size 15 0 24 15 30 1 gt 30 5 A 20 15 30z
98. tatus Configuration Overall Grade Al B lis o F Figure 4 10 shows the status configuration for AIM such that the grade A corresponds to Good the grades B C and D correspond to Fair and F corresponds to Poor FIGURE 4 10 Status Configuration for AIM AIM Status Configuration Overall Grade Al c D F V2 1 0 Feb 2009 DMx Verifier User Manual 4 9 Chapter DMx Verifier Reference Guide For DPM the verification status is determined by the parameter status of all enabled parameters For each parameter the parameter status is determined by the grade of the parameter and the status configuration for the parameter The verification status is the lowest parameter status of all enabled parameters Figure 4 11 shows the status configuration for DPM with tighter constraint on the Border Match quality For the DPM verification status to be Good Border Match Grade must be A and the rest of the enabled parameters must be A or B For the verification status to be Fair Border Match Grade must be B and the rest of the enabled parameters must be C or D If Border Match has the grade C or D then the verification status will be Poor FIGURE 4 11 Status Configuration for DPM DPM Status Configuration Cell Size Grade Al E cl D F V Center Offset Grade Al a D F v Size Offset Grade E 8 cl ol Ie v Cell Modulation Grade W E c ol Im NV Border Match Grade Al E D F Contrast Grad
99. ts View gt Undo Zoom This menu item restores the image to the original size before Zoom In was used View gt Solid Grid Select this menu item to change the appearance of the grid lines in the graphic display of the Data Matrix verification View gt Lite Grid Select this menu item to change the appearance of the grid lines in the graphic display of the Data Matrix verification View gt Camera The 0300 board supports up to four cameras You can select one of the cameras that is connected to the board for image acquisition View gt MXi String This menu item displays the data sent from the MXi and is visible after MXi has sent some data to the Verifier when its trigger is pushed 4 16 DMx Verifier User Manual V2 1 0 Feb 2009 Verifier Menu Descriptions View gt MXi ID Form FIGURE 4 17 User Info Dialog Box amp User Info Lx User ID initials ab Location cd MXi Serial 123456 Do not show this form next time This menu item displays the MXi ID Form and is visible when MXi is connected to the PC The same ID Form is usually displayed when you launch the Verifier while MXi is connected to the PC View gt MXi Header FIGURE 4 18 MXi Header Window DMx Verifier L i SW Release MXi beta V7 3 0 UserID ab Location cd MXi Serial 123456 2 rm E gt X Date 5 18 01 11 05 30 AM E o o o o oc This menu item displays
100. ty 0 0 i 5 o O io o O a lt o Ao co FIGURE 4 16 DMx Properties x Light on Dark Number of Rows 8 Number of Cols 18 ECC Level ECC 200 Image Style Normal Once Auto Check is successfully performed use this menu item to display the Data Matrix properties shown in Figure 4 16 View gt DMx Data After Auto Check is successfully performed use this menu item to display the DMx Data window that contains all Data Matrix verification results V2 1 0 Feb 2009 DMx Verifier User Manual 4 15 Chapter DMx Verifier Reference Guide View gt Threshold Display This menu item displays the thresholded image This is strictly a viewing tool that does not alter the original image Therefore it does not affect the Data Matrix verification results View gt Contrast Display This menu item displays the contrast enhanced image This is strictly a viewing tool that does not alter the original image Therefore it does not affect the Data Matrix verification results View gt Zoom In When verification is performed successfully on a small Data Matrix this menu may become enabled In this case you can use this menu to enlarge the Data Matrix graphical display and view more details You can even use the Set ROI button to clear the graphics and re enable Auto Check button Pressing the Auto Check button to perform the verification on the enlarged image usually gives you more accurate verification resul
101. vered Microscan Systems Inc warrants to the original purchaser that products manufactured by it will be free from defects in material and workmanship under normal use and service for a period of one year from the date of shipment This warranty is specifically limited to at Microscan s sole option repair or replacement with a functionally equivalent unit and return without charge for service or return freight What Is Excluded This limited warranty specifically excludes the following 1 Any products or parts that have been subject to misuse neglect accident unauthorized repair improper installation or abnormal conditions or operations 2 Any products or parts that have been transferred by the original purchaser 3 Customer mis adjustment of settings contrary to the procedure described in the Microscan Systems Inc owners manual 4 Upgrading software versions at customer request unless required to meet specifications in effect at the time of purchase 5 Units returned and found to have no failure will be excluded 6 Claims for damage in transit are to be directed to the freight carrier upon receipt Any use of the product is at purchaser s own risk This limited warranty is the only warranty provided by Microscan Systems Inc regarding the product Except for the limited warranty above the product is provided as is To the maximum extent permitted by law this express warranty excludes all other warranties express or implie
102. versal A 10 Region of Interest B 5 ROI B 5 S Sample data matrix with errors 3 6 overprinted data matrix 3 11 perfect data matrix image 3 3 underprinted data matrix 3 13 Scan Grade 2 10 Scanning Options 1 3 SCDI B 14 V2 1 0 Feb 2009 DMXx Verifier IM User Manual Index 3 Index SEMI Standard T2 A 1 iaqc 2 5 Set Menu 4 5 iso 15415 2 7 Setup status 2 15 system 2 16 View Menu 4 15 Side Lighting B 9 Size B 5 X offset 2 11 2 18 3 4 X Nominal Cell Size 2 3 Software Protection Key 1 4 Y Solid Border A 4 Y Nominal Cell Size 2 3 Square Continuous Diffuse Illumination B 14 Standards aim 2 1 iaqg 2 1 iso 15415 2 2 Starting Verifier 1 10 Status verification 2 15 Strain Relief 1 8 Strobe B 7 lighting B 7 Structured Append A 11 Surface Characteristics B 5 Symbol attributes A 7 contrast 2 3 2 7 2 8 2 13 2 16 density A 6 structure A 11 Symbology A 1 System configuration 1 2 setup 2 16 T Tips lighting B 16 Tools menu 4 19 recommended 1 5 U Unused Error Correction 2 4 2 9 2 14 3 5 V Verification aim 2 3 examples 2 16 guidelines 2 16 Index 4 DMx Verifier User Manual V2 1 0 Feb 2009
103. y ensuring direct light from the diffuser is equally intense as light coming from the beam splitter and the lighting cavity Increasing the diffuser width and elongating the chamber ensures any light directed to the object is uniform Refer to Figure B 13 e Excellent uniformity 20 across the lighting envelope at close range e Extraordinary diffuse illumination Illumination source include LED and microfluorescent sources DMx Verifier User Manual V2 1 0 Feb 2009 Aperture FIGURE B 13 Square Continuous Diffuse Illumination Camera Beam Splitter EMEN o Aperture The aperture is the adjustable opening in a lens that varies the amount of light reaching a target UJ The f stop indicates the size of the opening The larger the number the smaller the opening As you go from a smaller number to the next larger one e g 11 to 16 the amount of light reaching the target in the camera is reduced by one half o 97 i E The best image is obtained at the higher f stops settings however the aperture is smaller and less light enters the lens You will have to experiment with the aperture setting to obtain the best image for your application and lighting 3 o o o lt D c o pe S V2 1 0 Feb 2009 DMx Verifier TM User Manual B 15 Appendix Creating A Good Image Depth Of Field Depth of field is the size of the front to back distance that is in focus The aperture
104. y one of these problems or a combination of several problems it is difficult to identify the exact problems the magnitude of problems and how they should be corrected DPM Parameters Center Offset Size Offset and Cell Modulation are the three most important parameters for detecting problems unique to direct part marks Although IAQG and ISO 15415 may have parameters with similar concept or names these parameters in DPM are computed and graded in a more robust way They also have wider ranges for quality assessment to allow a variety of marks failing IAQG or ISO 15415 to still receive the grade C or D in DPM It has been proven that the marks with the grade C or D can be read reliably by higher performance Data Matrix scanners or readers Center Offset is an important parameter for marking methods such as dot peen and inkjet where the cell misplacement problem is more likely to happen Size Offset measures whether the On cells are produced in a uniform size Problems such as pressure change in dot peening or power variation in laser etching can cause the cells to vary in size significantly Poor Cell Modulation can be caused by cell misplacement cell size variation and the optical characteristics of the substrate If poor Cell Modulation is coupled with poor Center Offset and or Size Offset then the latter two problems must be corrected first Poor Cell Modulation with acceptable Center Offset and Size Offset is a clear indication that t
105. y to you This warranty gives you specific legal rights and you may also have other rights which may vary from state to state Tel 425 226 5700 Fax 425 226 8250 helpdesk microscan com PREFACE CHAPTER 1 Contents Welcome xi Purpose of This Manual xi Manual Conventions xi Before You Begin 1 1 DMx Verifier 1 1 Base Configuration 1 2 System Configuration 1 2 Scanning Options 1 3 PC Requirements 1 3 Software Installation 1 4 Installing Hardware 1 4 Basic Setup Procedures 1 4 General Location Considerations 1 4 Environmental Requirements 1 5 Recommended Tools 1 5 Installing the 0300 Board 1 5 Installing the Internal Camera Power Cable 1 6 Connecting the Camera Cable 1 6 Camera Mount 1 7 Checklist 1 7 Ensuring the Best Field of View 1 8 Adjusting the Camera Position 1 9 V2 1 0 Feb 2009 DMXx Verifier IM User Manual Contents CHAPTER 2 Clamping the Lens 1 9 Rebooting the System amp Starting DMx Verifier 1 10 You Are Done 1 12 DMx Verifier Overview 2 1 Introduction 2 1 Description of Measured Parameters 2 3 AIM Verification ISO 16022 2 3 Symbol Contrast SC 2 3 Axial Nonuniformity AN 2 4 Print Growth PG 2 4 Unused Error Correction UEC 2 4 Overall Symbol Grade 2 5 IAQG Verification AS9132 Rev A 2 5 Dot Size 2 6 Dot Center Offset 2 6 Angle of Distortion 2 7 Ovality 2 7 Module Fill 2 7 Symbol Contrast 2 7 Overall Grade 2 7 ISO 15415 Verification 2 7 Reference Decode 2

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