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BandSel Manual

1. Taun HIOOI EDOIY342 0002 ET 6 THIYEdO ILY KO LL Td323414 KOIIYTIdYVA 225 ENYN NOIIVIHVA T z veyacunuivuvqauurn Tespuvuis rr4 mwiboi4l vuvuu q amag ou s rboyovqs y yz y uTuL 01 dSISISIOEUN IZIH VIVI S 0441u 104 1854 uonpunA yuk 2 Figure 12 Print previevv screen lets you see the report on the screen You have the options to print the report or to save in a text file BandSel User s Guide Thin Kerf Technologies Inc BandSel User s Guide Thin Kerf Technologies Inc 27 Help Menu Options Online Manual Use this option to view this manual online see diagram below Contents The first tab Contents is like a Table of Contents for the manual Each heading with an icon in the of a book is a Chapter Double clicking a chapter will show the sections in that chapter If you double click a section the contents of the section would be displayed Index This tab lists all the sections in alphabetical order Highlight the section you want to read and press the Display button Find This tab lets you search the online manual Type in a phrase in the first line and the second line list all the matches in the manual Initially all the entries would be selected and the third list shows all the sections that contain these matches If you select one of the matches the third list would show all the sections containing that phrase Select the section y
2. Figure 14 The Design Screen Other than feed speed calculations user inputs can be found in the User Entry Area and calculated values are found in the Calculations Area BandSel User s Guide Thin Kerf Technologies Inc BandSel User s Guide Step 1 Step 2 Step 3 Step 4 Hint Option Buttons Thin Kerf Technologies Inc 30 The Calculations Area BandSel generates all the important numbers you need to finish the design of your Bandmill The numbers are provided in the Calculations Area and consists of six sections Gullet Cracking Guide Pressure Feed Speeds Cutting Time and Tooth Design Entering Data The reason for creating variations is to allow you to change existing parameters to your Bandmill to see how it will affect performance This way you can eliminate costly trial and error tests To change an operating parameter do the following Click on the section where the operating parameter is located Click on the field to change Type in a valid number To finish the calculations press the Enter key or move the cursor to another field For example let s say you want to increase your side clearance by 0 010 inches but would like to see the affects on the kerf before you save the changes In the User Entry Area click on the Tooth Design section Click also the Tooth Design section in the Calculations Area At the moment the side clearance is 0 015 giving a kerf of 0 093 inches To increase the side c
3. q EOS r CER RO de 9 Starting BandSel 7 10 Qilick Start T torial 5a rey y RESQUE REG x CPU Ia OK 12 Opening the Tutorial Machine File 2002 00 24 4 EX e REALES uns 12 Viewing the Master Variation peek eR REQUE EAY a eile eyed 12 Creating a New Variation vs osc sane task Dp aaa eee ORAL ER E 13 Moving to Another Variations a odes poe Ra eae ys 13 Making Changes to Your Variations 13 Printing Reports 4 i404 ches A deeb il eee dana ened ed dees 14 Closing and Exiting BandSel For Windows 0 0 eee eee eee eee 14 s oerte Wee ne ssa o eive te banda 14 Managing Your Files and Variations eee eee ee 15 The Main Screen y b ba Sad 15 Opening A Machine File esae Ere Kex Se Pee Sean t 15 The Mast r Variation Vu wea he PRINS neon aE ed IER EL Ke 19 Selecune a Default Printer vo ex nes vaca ew E MESES DPA X NO MERE eee es 20 Other Options in the File Men sue oie DER da dae ud 21 Ihe Variations Menu E AURA dubla nd PY 21 Pint Men uiti yy yaa xo payaya P 24 Windows Meni ise yaa sal so ab 24 D sign Sereeh io iioi ey saa ek dp sa olay Bala d b RCM DUE 27 he User Entry EE REDE A Ee 27 he Ccaleulatons Ared oos Geet Rex Gee RN REED ME EE 29 Enter
4. xen 23 SAV Sed 23 Save 28 se y RR ELA 23 2 ede exe e 33 ERAS 27 Back clearance angle 37 Gullet area one nrbe 38 Gullet condition 38 Hook angle 37 Hook length 37 46 Pitchi Fat luv pada Dayan 37 Side clearance 37 Tooth Design RS 29 Tooth Design Section 37 46 Gullet Area oily niece birds 46 Actual Gullet Area 38 Back Clearance Angle 37 Grinding Factor 38 Gullet Depth 37 Gullet Radius 37 Hook Angle 37 Hook Length 46 KOH a 46 Thin Kerf Technologies Inc Tooth Pitch 37 TOD spam aa 39 Top Wheel Assembly 35 Weight secor 35 Trouble shooting 60 Xarnation t 2 anes Rise 5 Weight of top wheel 35 What s New in BandSel for Windows 2 Better Printing Capabilities 3 Direct Calculation of Sawing Deviatior Extensive Feed Speed Analysis 2 Improved Horsepower Calculations 3 Input Screens and Worksheets Have Been Incorporated 3 Machine Files are Now Independant 2 Several Variations Can Be Opened at Once rois REX EHE 3 Template Files Used to Create New Machine Files 2 Wheel condition 36 57 Windows Menu 24 Cascade z
5. Creating a Nevv Variation 13 Exiting BandSel 14 Making Changes 13 Moving to Another Variation 13 Opening 12 Printing Reports 14 Saving Your Changes 14 Vievving the Master 12 SAVE shut Ra bzn ma PRA Pairs 21 Sawing accuracy 53 60 Side clearance 15e sse op ala 60 Critical minimum 54 sine bar byes date 44 Sine Bar Setting ec yega 44 Span Minimum maximum 39 Specific cutting energy 56 rez Rees 60 Starting BandSel 10 73 BandSel User s Guide Stiffness a ene 35 Strain system design 35 Surface roughness 55 60 System Requirements 7 Tare POwer ueniet E 36 Template c Seg aa ho Ex OR 21 Tensioning 33 34 58 The Calculations Area 28 POMADA Yaa e e e de 32 The Main Screen 15 Menuoptions 15 The User Entry Area 27 Bandmill Design Section 35 Description Section 42 Tooth Design Section 37 Wood Properties Section 41 The Variations Menu 21 Close die meus 23 Delete s suse ed ex papa 24 New Variation 22 Open A Variation 21 Open All Variations 22 Open Master i o0 as sess 21 Rename 2 6 zu s y
6. ELA ats 24 Tile Horizontally 24 Tile Vertically 2 vi 24 6000300000 27 Factors affecting cutting 42 55 Wood Properties Section 41 VVorksheet Guide pressure 2 40 bccn eens 44 Tooth design 46 74
7. Navigating Around the Feed Speed Screen Adding a depth of To add a depth of cut use the Add button on the Feed Speed cut Screen The window that opens see Figure 30 requires you to enter the new depth of cut cut elevation feed speed and guide span The Guide Span is initially set to the Maximum Span BandSel inserts values for the maximum GFI and standard deviation and the bite per tooth Add A Depth Of Cut Fafa E Depth Of Cut Guide Span 39 000 Cut Elevation 30 000 in dn Feed Speed fpm Add Cancel Figure 30 Adding a new depth of cut The number of depth of cuts for each Variation is limited to 20 Sorting your depth Use the Rearrange button to sort your depth of cuts in ascending of cuts order This is useful when you add or change a depth of cut Removing a Depth Use the Remove button to delete the current depth of cut You Of Cut will not be able to all depths of cut as BandSel requires that there will be at least one per Variation Saving Your With the Save Copy button you would be able to choose your Changes depth of cuts in three different ways 1 Update only the current Variation Will only save these depth of cuts in the current variation 2 Update all opened Variations Saves all opened Variations using the feed speed calculations from the current Variation 3 Update all Variations Will save all variations in the opened Machine File using the values fro
8. Span and Feed Speed so that individual Recommended Maximum Feed Speed and GFI can be determined BandSel User s Guide Thin Kerf Technologies Inc Improved Horsepower Calculations Power calculations are now based on wood density and bite per tooth Input Screens and Worksheets Have Been Incorporated Previous versions had individual input screens such as the Blade Design Screen Calculated values and analysis of these numbers were then done on worksheets BandSel has now combined the two into one screen the Design Screen A typical Design Screen is shown in Figure 1 Having all the information on one screen makes it easier to navigate through the numbers and makes information more accessible Several Variations Can Be Opened at Once BandSel now allows multiple Variations to be opened at the same time Going from one to the other can be done just by clicking on one Design Screen to the other Better Printing Capabilities BandSel for Windows now has more powerful printing capabilities including Print Preview and Print to File commands BandSel User s Guide w 2300 40 134 ong 1163 s m d 69 0 qun l 2010 helA q Buwes pieog uii A payeumns 3 uid B8c wdy l fupuag yoo ud Opt ulpeonoaAt yang p ds p 4 umnumxe y papuawwosay uid LGL 95ue1623 7 apis uidj 52 apg ununu l w ul paads paa ununuij papuawwosay dj GEC p
9. The Variation you just created now sits on top of the Master Variation To view the Master press the Windows menu and you will see all the variations currently opened Move the mouse down to where it says 1 Master and select it The Master Design Screen should now be on top Return to the Windows menu and put the new Variation on top Step 5 Making Changes to Your Variations We have not increased the strain yet In the Design Screen for the Strain Changed Variation find the tab labeled Feed Speed and select it Click the Bandmill Design tab as well Select the Strain field delete the current value and replace it with 20000 Now press the Enter key You may have noticed that the Recommended Maximum Feed Speed for Sawing Deviation for the depth of cut of 1 inch increased from 875 to 983 Fpm This can be verified by checking with the Master Variation Thin Kerf Technologies Inc BandSel User s Guide 14 Step 6 Saving Your Changes To save your changes go to the Variations menu and select the Save option Step 7 Printing Reports Make sure your printer is on Go to the Print menu and select the Print option A report is now automatically being sent to the computer If you have several printers connected to your computer BandSel lets you choose which one to send the report to This option is found in the File menu Step 8 Closing and Exiting BandSel For Wind
10. To optimize the trade off between production and recovery 5 To reduce the guess work and time to find solutions to sawing problems 6 To aid in the training of apprentice filers and benchmen Information from BandSel Bite per tooth and gullet loading Gullet area calculation based on Armstrong Formula D Guide pressure settings Power requirements Recommended minimum and maximum feed speeds Effect of side clearance and gullet overloading on sawing deviation A Bandsaw Fatigue Index to warn if the blade is over stressed Warnings when operational limits are exceeded What s New in BandSel for Windows This section will provide an overview on the features that have been added or from the DOS version of BandSel Details of each point will be provided in appropriate sections Template Files Used to Create New Machine Files You can choose from several Template files to supply default data when you create a new Machine file You can also create your own template file Machine Files are Now Independent BandSel users can now share Machine Files Direct Calculation of Sawing Deviation Within board sawing deviations is calculated instead of the Load Index although the technology is still being used in the program Extensive Feed Speed Analysis You are no longer restricted to three depth of cuts maximum average and minimum BandSel now allows 20 For each depth of cut you can enter its own operating parameters such as Guide
11. and continue making a new Variation No Don t save the Master and continue making a new Variation Cancel Don t save the Master and cancel making a new Variation Step 2 This next window prompts you to enter a Variation name BandSel provides you with a name The list on the right shows all the Variations in this Machine You cannot use and of these and will be notified if you entered one of these Refer to Figure 11 Step 3 optional Next enter a description This is optional but we do recommend that you have one for each Variation Examples of names and descriptions are as below Thin Kerf Technologies Inc 23 BandSel User s Guide 24 Newsaw Standard 15000 Ib strain 17 Ga Dryfir Standard Effects of cutting dry belt fir Topguide Effects of installing a moving top guide Faster Effects of faster feeds for small logs Lessside Standard reduction of side clearance to 0 025 PitchA Tooth pitch of 1 5 inches PitchB Tooth pitch of 2 inches Press the Save button to create and open the Variation or the Step 4 Cancel button to quit making a Variation Add New Variation Enter New Variation Name Existing Variations Wariation5 Variation Description Figure 11 Adding a Variation Save Changes to a Variation are not permanent until they are saved This allows the user to do a quick vvhat if without altering the existing data Use this Save option to save the changes
12. deep depths of cut it may not be practical to avoid overloading the gullet with sawdust In this case a different set of conditions must be satisfied to obtain acceptable sawing accuracy Since the gullet is overloaded the side clearance needs to be larger than the bite to allow the sawdust to spill easily The larger the Gullet Feed Index the more clearance is needed Factors that affect Production Production volume is controlled by 1 2 3 4 Blade robustness The robustness of the blade is important since more can go wrong at higher feed speeds Gullet capacity The gullet must have the capacity to carry all the sawdust that is produced Feed speeds Proper selection of feed speeds is important especially for feed systems that automatically set the speed based on log diameter Stoppages It may be better to slow down the feed speed of the Bandmill to obtain a smoother mill flow thus avoiding pile BandSel User s Guide Thin Kerf Technologies Inc 56 ups on the conveyors The net result is an increase in production for the whole mill 5 Loading and scanning time The time required for loading and scanning logs is generally more than half of the cycle time for the log Headrigs and scanning twins quads cut for only a third of time 6 Wood properties Cutting dense wood requires more power and produces larger cutting forces Expect the cutting deviation to increase as the specific gravity density increa
13. specified in the previous section Click on the button that says Open an Existing Machine File In the next window you will have a list of Machine Files Click on the file TUTORTAL SEL Now press the Open button Viewing the Master Variation The TUTORIAL file has two Variations We will open the Master Variation To do this click the Open button on the new window In a few seconds the Master Variation s Design Screen will open 12 BandSel User s Guide 13 Notice on top of this window that the Variation s name and description is shown Step 3 Creating a New Variation Let s say you want to see what will happen if you changed the strain on your bandsaw We will now create a new variation so that the Master variation s data will be kept as a record of your current cutting conditions On top of the screen you would see the menus for BandSel Select the Variations menu and click New Variation This new window allows you enter a name for this Variation BandSel automatically enters a name for the variation In this case it is Variation2 since it is the first variation for this Machine file Enter this field and replace Variation2 with Strain Changed Next select the Description field and type Strain increased to 20000 Ib To create this Variation and to view it press the Save button You now have two Design Screens on display Step 4 Moving to Another Variation
14. will discuss the rest of the options in the File Menu followed by the remaining four menus Variations Windows Print and Help Opening A Machine File To open a Machine File use the Open option in the File Menu The window that opens is used to find existing Machine Files Figure 5 shows how you can navigate around your computer to look for Machine Files BandSel User s Guide want to perform search Select directory where you Move up one directory Listthe Machine files 4 CN Lists the Machine Files in the current directory Highlight the file you want _ fo open and press the Open button Shows the Machine File you selected aus N List Machine View desktop files and details Existing File WA Look in C3 Data 6 foot resaw sel portable sel TUTORIAL sel File name Files of type Open as read only Press the Open button to open the Machine File you selected Press the Cancel to exit this window Figure 5 Use this window to search your computer for existing Machine Files Step 2 Step 3 Hint Thin Kerf Technologies Inc When BandSel was installed it created a directory named Data This would be the default directory when you search for existing Machine Files We recommend that you keep all your Machine File under one directory not necessarily the one supplied by BandSel Anytime you want to exit this windo
15. 56 Assessing Blade and Bandmill Maintenance 57 Guidelines for Assessing the Condition of the Wheels 57 Rating the Level of Tensioning 58 Rating the Condition of the Gullet 9 0 000 59 How to use BandSel for Trouble Shooting Sawing Problems 60 Appendix A Template Files RR RE GRE RA DER RA REDERYR 64 Thin Kerf Technologies Inc BandSel User s Guide Thin Kerf Technologies Inc SECTION 1 INTRODUCTION BandSel is a computer program that helps saw filers maintenance supervisors and production managers make decisions about saw design and operation BandSel includes the tried and true rules of bandsaw design and also incorporates the latest developments in bandsaw technology BandSel is unique It uses a computer model of the bandsaw blade including the teeth roll tensioning bandmill strain and blade speed to estimate blade stiffness which is the most important factor affecting cutting accuracy The core of BandSel is it s ability to calculate saw stiffness and from that sawing deviation In the previous version of BandSel sawing performance was expressed with the Load Index which is a number that is proportional to sawing deviation So if the Load Index increased by a certain percentage then the sawing deviation would be expected to go up by the same percentage This ve
16. Area has six tabbed sections Blade Design Bandmill Tooth Design Guide Location Wood Properties and Description Please familiarize yourself with each section so that you know where each user input is located To move from one section to another use the mouse to click the section s title 29 2900 4001 r q aNg Leg uamog 690 149 FED u nplAsq 5 payeuns 4 uidjs 3900 L paeds wes wdy 822 Duwe g wdy L Supuag yoo wdy FE Buipeopaag ang paads paa unumre y mgng mod agneip H _ neJ wd LGL 32ugi amp 3 E Gc yg e S00 0 ag ununun Lois MF poog Jj paadg j p pu uulos q ie p q y s juaga2x3 j 000 02 ueds sping ul ysds urea suonipuv pay M cu olla pay m REM i 000 E uone a 3 ang 007 0 235 wy 1 000 01 3n3 JO mdaq dH 10j3e 4 fun pasds mud are ifia A aay doy 211 0 0006 uens yesi oz 001 paads jay 000 Say n PP O O nq n daq usag uoo 1 ing ubisa q apeg uhis q amssaig saniadaig uonea20 a quo 2741 Sumng peris P993 open 25 poo aping Ix lel EE 3727740775 s Jyeje qur jaspue ureib0193 7 24 v r suone nope eur g ry Knug Jos M 2
17. BandSel For Windows A Program for Improving Bandsaw Design and Operation User s Manual Thin Kerf Technologies Inc 5454 192 Street Surrey B C Canada V3S 8E5 Web www thinkerf com Email thinkerf thinkerf com 604 576 9455 Fax 604 576 8449 BandSel For Windows User s Manual Version 2 0 2000 Thin Kerf Technologies Inc 5454 192 St Surrey B C Canada Tel 604 576 9455 Fax 604 576 8449 www thinkerf com All rights reserved No part of this document may be reproduced or transmitted in any form or by any means electronic of mechanical for any purpose without the express written permission of Thin Kerf Technologies Inc who have copyright to the material herein Printed in Canada Thin Kerf Technologies Inc BandSel User s Guide TABLE OF CONTENTS Introduction 24 sich sieve IEEE LATER 1 Purposes and Uses of BandSel sez ous ests dee ERES YR E rer QS 1 Information from BandSel ve ala s m et LES MELIOREM sat eee Ost 4 2 What s New in BandSel for Windows 9 0 eee eens 2 Overview of How to Use BandSel 5 Installing and Running BandSel 8 8 90 0 7 System REQUITEMENIS se eee ss ba dee EI eda pla J Installing BandSel zio yk Ru p Rp prias EEES 7 8 Adding a BandSel Icon to your Desktop 9 Resistenng HORII ws dui ea a
18. Current guide offset Air BLADE Thi ckness Wi dth Discard width Tensioning Blade length Saw run ti me None TOOTH Side c Pitch Gul let Hook a Back c earance depth gle earance angle Gullet bottom radius Actual gullet area Grinding Fine WOOD PROPERTIES Specific gravity CUTTI NG CONDI TI ONS Depth of cut Elevation Feed speed Cut elevation Depth Of Cut Mi ni mum Bite Per Tooth Maxi mum GFI Maxi mum Sawing Deviation Excellent Low Medi um or www thinkerf com MI NI MUM n 3 000 r Arm Rubber or Hydrau b 0 0 rpm 0 i gt 0 gt 0 gt 0 Poor gt 0 gt 0 hp 0 i gt 0 MAXI MUM Leve Good Fair or 0 001 0 010 0 010 Medium or High ft 3 gt 0 hrs 100 in in in Deg Deg in Sq in Coarse 50 Gui a 0 gt 0 G 32 120 lic 100 000 10 000 6 000 100 Maxi mum Span 100 100 100 500 2 gt 0 de Span Cut nd lt 100 1000 uide Span Maximum Span 1 in 20 Table 1 User Entries and their units and limits Thin Kerf Technologies Inc 20 1 5 BandSel User s Guide 33 User Entry Blade Design Section The Blade Design Section asks for the dimensions of the saw plate excluding the teeth and the level of tensioning You will find this in the User Entry Area see below Figure 16 shows the blade dimensions Hf E BandSelwindowsMod Data TUTORIAL sel 21 File Variation
19. File Location The next window is similar to the one to let you search for existing Machine files Figure 8 It is navigated around the same way The default directory is also Data If you delete this directory then the default directory is where you installed your BandSel Entering a Machine Filename Click on the field titled File name Type in a valid filename You are limited to 255 characters and cannot contain the characters lt gt or Saving Your Machine File Press the Save button to create your new Machine file You will get an error message if you entered an invalid filename If you enter a filename that already exists BandSel would ask if you want to replace it Pressing the Cancel button anytime will close this window and return to the Main screen The Master Variation Anytime you create a new Machine file a Master variation is BandSel User s Guide Thin Kerf Technologies Inc created using data from the template file you selected This variation will automatically open 20 BandSel User s Guide Thin Kerf Technologies Inc 21 Save in a Data 21 tal zl e B foot resaw sel portable sel TUTORIAL sel Save as type Bandsel Files 7 Cancel Open as read only 2 Figure 8 Enter you the name of nevv Machine file and press the Save button Selecting a Default Printer Printer Select iSi x Use Default Printer HP LaserJet 5L PCL Use Defa
20. Manual 26 Hook Angle 37 Hook length 46 Information from BandSel 2 Information from BandSel 2 Input screen Blade design 30 32 Feeds and speeds 19 Guide location 39 VVood properties 41 Installing and Running BandSel 7 Installing BandSel 7 Adding a BandSel Icon 9 For Windows 95 Users 8 Registering BandSel 9 Thin Kerf Technologies Inc Sereen Size sc iil rede RR dg 8 Keti Ie 46 Managing Your Files and Variations 15 Master File 2 24 s ety equ Rx b 5 Menu Options 15 New el y n ER S RR 5 Opel iac pedea P ARA quien 15 Opening A Machine File 15 navigate around 15 Option Buttons 29 Other Options in the File Menu 21 Close sea a nk q ba 21 Delete coise ridna RRS ERIS 21 PA ae sd asse TRIS 21 uote iced adeat PER 21 Savas y a aaa 21 Save As Template 21 Overview of How to Use BandSel 5 Power required d ox Oe tenes 56 60 Pant Mem ss e oe te ae oe 24 Print Preview 24 Text Pile 24 4025 ERI 24 Turner ho 04a 24 Printera 0 da ies oak 20 Production factors 54 Purposes and Uses of BandSel 1 Quick Start Tutorial 12 Closing and Exiting 14
21. OPERTIES Tare power 10 Hp Wood Species Western Red Cedar Ideal guide offset 0 160 in Specific Gravity 0 330 BLADE Thickness 0 042 in Width 6 0 in Discard width 5 0 in Blade speed 5655 sfpm Tensioning Medium Blade length 18 50 ft Shift time 4 0 hrs Depth of Cut in Feed Speed fpm 0 Guide Span in Minimum Bite Per Tooth in Cut Elevation in go 1 Limitations GFI 0 65 Limitations Standard Deviation in Percentage Of Cut Length is Ja Ju l fs Cut Time min 150 2 35 Thin Kerf Technologies Inc BandSel User s Guide TEMPLATE NAME Portable smp DESCRIPTION Portable Bandmill BANDMILL Wheel diameter 18 0 in Strain system Rubber Indicated strain 4000 Ib Top wheel weight 0 Ib Wheel speed 800 rpm Maximum span 6 0 in Minimum span 18 0 in Wheel condition Good Top span 20 0 in Bottom span 20 0 in Tare power 10 Hp Ideal guide offset 0 300 in BLADE Thickness 0 042 in Width 6 0 in Discard width 5 0 in Blade speed 3770 sfpm Tensioning Medium Blade length 18 50 ft Shift time 4 0 hrs Depth of Cut in Feed Speed fpm Cut Elevation in Guide Span in Minimum Bite Per Tooth in Limitations GFI Limitations Standard Deviation in Percentage Of Cut Length Cut Time min Thin Kerf Technologies Inc TOOTH Side clearance 0 020 in Pitch 1 25 in Gullet depth 0 250 in Hook angle 20 deg Back clearance angle 18 deg Gullet bottom radius 0 050 in Grinding Medium WOOD PROPERTIES Wood Spe
22. Red Cedar Ideal guide offset 0 480 in Specific Gravity 0 590 BLADE Thickness 0 058 in Width 6 0 in Discard width 5 0 in Blade speed 7540 sfpm Tensioning Medium Blade length 25 0 ft Shift time 8 0 hrs Depth of Cut in Feed Speed fpm Cut Elevation in Guide Span in Minimum Bite Per Tooth in Limitations GFI Limitations Standard Deviation 0 01 0 01 in Percentage Of Cut Length Cut Time min 17 5 Thin Kerf Technologies Inc BandSel User s Guide TEMPLATE NAME 5foot smp DESCRIPTION 5 Foot Bandmill BANDMILL TOOTH Wheel diameter 60 0in Side clearance 0 025 in Strain system Air Pitch 1 75 in Indicated strain 15000 Ib Gullet depth 0 625 in Top wheel weight 0 Ib Hook angle 30 deg Wheel speed 600 rpm Back clearance angle 12 deg Maximum span 30 0 in Gullet bottom radius 0 375 in Minimum span 18 0 in Grinding Medium Wheel condition Good Top span 32 0 in Bottom span 38 0in WOOD PROPERTIES Tare power 15 Hp Wood Species Western Red Cedar Ideal guide offset 0 427 in Specific Gravity 0 40 BLADE Thickness 0 0625 in Width 9 0 in Discard width 7 0 in Blade speed 9425 sfpm Tensioning Medium Blade length 31 33 ft Shift time 8 0 hrs Depth of Cut in Feed Speed fpm Cut Elevation in 3 3 Guide Span in Minimum Bite Per Tooth in Limitations GFI 0 65 Limitations Standard Deviation 0 02 0 02 0 02 0 02 0 015 in Percentage Of Cut Length 0 Cut Time min 13 33 13 16 14 29 Thin Kerf Techn
23. Save As Creates a new variation using data from the current Variation Again you will be asked to save the current variation first before a new one is created The steps are similar to creating a new Variation and the same window is used see Figure 11 Rename Renames the current variation You cannot rename the Master or use an existing Variation name The steps are similar to creating a new Variation Close Closes the current variation If you made changes you would Thin Kerf Technologies Inc BandSel User s Guide 25 be asked if you vvant to save these changes Delete Deletes the current variation This option will not work with the Master Print Menu BandSel allows you to generate a quick report on an opened Variation You have the option to direct it to your printer screen or to a text file To Printer Let s you print the current variation Make sure your printer is on and there is plenty of paper Print Preview Let s you print the current Variation An example is shown on the following page Use the scrollbars to view the whole report In the preview mode you also have the option to print the report or to save it to a file To print the report press the Print button Text File To save the report in a file press the Save to File button Use the window that just opened to enter the file name and where you want to put it Again the default directory is Data The file is saved as a text
24. Tonriei y 22 11 ko Figure 22 Wood Properties Screen You can either use the values from the list or enter in you own wood species and specific gravity BandSel User s Guide 43 User Entry Description Section You can make changes to the Variation s description in this section Registration information is also provided Hf C Program FilesXBandSel winXDataXTUTORIAL sel File Variations Window Print Help me s Haster Blade Design Tooth Design Location Properties E Variation Description m Thin Kerf Technologies Inc Bruce Lehmann Figure 23 The Description Section Thin Kerf Technologies Inc BandSel User s Guide 44 Calculations Area Gullet Cracking Section Bandsaw Fatigue The Bandsaw Fatigue Index BFI shows when the stresses in Index the blade are too large or the time between saw changes is too long Larger stresses and longer run times result in a smaller BFI and an increased likelihood of gullet cracking Expect cracking problems if the BFI is less than 1 5 On the other hand a BFI of 3 or 4 indicates conservative stresses on the blade d Feed ited BandS aw Fatigue Index 0 665 Figure 24 Gullet Cracking Section Thin Kerf Technologies Inc BandSel User s Guide Ideal Guide Pressure and Guide Offset Sine Bar Settings Thin Kerf Technologies Inc 45 Calculations Area Guide Pressure Section The Guide Pressure Worksheet cal
25. ading TIR around the wheel rim is more than 0 005 inches A good wheel should only be 0 002 inches TIR Rating the Level of Tensioning The level of tensioning affects the stress is on the gullet As this stress increases so does the blade stiffness However the likelihood of gullet cracks also increases A rule of thumb for assessing the tensioning is to measure the light gap with a circle gauge Low Tensioned to a 60 ft or 80 ft circle gauge Medium Tensioned to a 40 ft circle gauge with no light showing The blade lies flat on the levelling slab High Tensioned to a 40 ft circle gauge with light showing The blade may have to be held flat on the levelling slab Other factors that affect the assessment of tensioning are 1 Tire line width The further the rolling is carried out to the edges of the saw the higher the stress on the gullet 2 Gullet peening and Proctor rolling reduce or eliminate the stresses at the gullet bottom and greatly reduces the likelihood of gullet cracking These procedures do not significantly affect blade stiffness 3 If the blades require much re levelling or re tensioning then more stresses are put on the gullet each time the saw is benched BandSel User s Guide Thin Kerf Technologies Inc 60 Rating the Condition of the Gullet The condition of the gullet reflects the smoothness of the grinding and the changes in the metal that occur as a result of the grinding Gullet cracks
26. ain You can try to register as many times as needed If you have problems registering please contact TKT Registering the software is done only once Starting BandSel To start the program follow Steps 1 3 in the above section If you added an icon on your desktop you can also double click it to start the program After doing this the Startup screen appears which shows the registered company Name and Division This window will close by itself and proceed to the main part of the BandSel program see Figure 4 Thin Kerf Technologies Inc BandSel User s Guide Figure 4 Opening screen Thin Kerf Technologies Inc 11 BandSel User s Guide Step 1 Step 2 Thin Kerf Technologies Inc SECTION 3 QUICK START TUTORIAL This section provides a quick start into BandSel by showing an example of entering and analyzing the data for one bandsaw The instructions in this tutorial are not detailed but the tutorial does introduce the important ideas of creating the Machine File entering the data and analyzing the data For more detailed instructions see Sections 4 and 5 This tutorial uses a Machine File supplied with BandSel There is no need to enter data but changes can be made without causing problems Opening the Tutorial Machine File If you are already in BandSel you should be in a window that let s you open an existing Machine File or to create a new one If you are not in the program start BandSel as
27. ard sawing deviation is calculated for each feed speed and current cutting conditions Note that this is not the total sawing deviation which includes the between board deviation and calculated as 2 2 ST Sw tSp BandSel User s Guide c O p o e D Uu 0 5 0 6 0 7 Gullet Feed Index Figure 29 As you increase your Gullet Feed Index GFI you sawing deviation also Recommended Maximum Feed Speeds Recommended Minimum Feed Speed Thin Kerf Technologies Inc BandSel recommends 3 Maximum Feed Speeds limited by either tooth bending gullet overloading or sawing deviation To prevent tooth bending the bite per tooth should be less than the blade thickness The number BandSel provides is the maximum feed speed before the bite per tooth exceeds the blade thickness BandSel uses the entered Maximum GFP and Maximum Sawing Deviation value to determine the other two maximum feed speeds If the feed speed you entered is greater than any of the recommended feed speeds that feed speed would be shown in red Recommended Minimum Feed Speed is selected so that the bite per tooth is larger than the side clearance This ensures that the amount of sawdust spillage is limited which avoids the problem of snaking due to sawdust packing between the blade and the wood 50 BandSel User s Guide 51 The second feed speed is calculated using the Minimum Bite Per Tooth entered by the user
28. b Settings for 5 Sine Bar Top Span 0 080 in Bottom Span 0 067 in Figure 25 Guide Pressure Screen BandSel User s Guide Sine Bar Micrometer Figure 26 Sine Bar for setting Guide Pressure Thin Kerf Technologies Inc 46 BandSel User s Guide Kerf Hook Length Gullet Area Thin Kerf Technologies Inc 47 Calculations Area Tooth Design Section The Tooth Design Worksheet looks at three factors of tooth design the most important of which is the gullet area The Kerf is the width of the tooth tip The Hook Length is the length of the straight section of the tooth profile just below the tooth tip See Diagram 28 If this length is too short then there will be problems swaging or tipping the teeth The calculation of the Hook Length is based on the Armstrong Formula D tooth profile Hook Length is affected by the hook angle gullet depth and the width of the grinding wheel This value is the number used in the calculations and is either what you ve entered in the Tooth Design Screen or is calculated from the Armstrong Formula D We recommend that you use the Armstrong Formula D as you can see the impact of changing the tooth pitch or depth on gullet area without having to sketch a tooth on grid paper and count squares Kerf 0 093 in Gullet Area 0 966 Sq In From Armstrong Formula D Hook Length 0 361 in Figure 27 Tooth Design Screen BandSel User s Guid
29. chnologies Inc 61 SECTION 8 HOVV TO USE BANDSEL FOR TROUBLE SHOOTING SAWING PROBLEMS BandSel is designed to investigate whether a change in the saw or feed speed will help production or improve quality BandSel can also be used to solve problems with existing bandmill The problems that BandSel can help solve are High sawing deviation Gullet cracking Saw stalling Rough surface Excessive guide wear A Problem and Solution Grid is provided at the end of this section that lists the problem the indicator and source of the problem and some possible solutions The first step is to enter the data for the bandsaw as it is now BandSel has six indicators of where problems may be occurring Sawing deviation Power requirements Gullet Feed Index GFT Bite per tooth Guide offset and pressure Bandsaw Fatigue Index BFI Side clearance BandSel User s Guide Subjective Factors Thin Kerf Technologies Inc 62 If these indicators are within the ranges recommended in BandSel and this manual then re evaluate the subjective variables which include The level of tensioning and the consistency of blade tensioning and maintenance Gullet condition and grinding smoothness Wheel condition Specific gravity density of the wood When using BandSel to track down a sawing problem experiment by making one or more of these factors worse than you think they are or you would like to think they are This comment applies espec
30. cies Western Red Cedar Specific Gravity 0 480 4 120 2 0 01 s b lo s js s 0 01 0 01 0 015 0 015 0 015 0 015 s 0 65 29 17 43 75 33 38 22 22 Table Continues 70 BandSel User s Guide Depth of Cut in Feed Speed fpm Cut Elevation in Guide Span in Minimum Bite Per Tooth in Limitations GFI Limitations Standard Deviation in Percentage Of Cut Length Cut Time min Thin Kerf Technologies Inc jo e Dam o fo 71 BandSel User s Guide INDEX Alignment i 53 Selecting the Machine File Location 19 Bandil 2 ses eese RIRs 27 The Master Variation 19 Strain system 35 Cutting forces i s a MES EAS 53 56 Tate power v1 2 oed ean xa ku 36 Cutting Time s 29 50 Top wheel weight 35 Data Directory case Rs 16 Wheel condition 36 default directory 16 Wheeldiameter 35 Description Section 42 YVUnecLspeeo seda thesis 33 Desenpioh 2 542 io E aed 27 Bandmill Design Section 35 Design Screen v3 v 27 Condition of the VVheels 36 The Calculations Area 28 Saw Speed k sl 36 The User Entry Area 27 SII oe ya b 35 Discard width si a oe dines 33 Strain System Design 35 Feed Speeds iisdem he Ie RERGG 29 Tare Power sS veis vex gU 36 Feed system ogere uve VER o l 53 Weight of To
31. culates the proper offset for the guides The Guide Pressure is the force that the blade puts on the guides This force is a result of adjusting the guides to be proud of the front surface of the wheels by a distance called the Guide Offset It is important to have the correct guide pressure If the pressure is too low the cutting forces can pull the blade away from the guides Without the support of the guides the blade stiffness is reduced resulting in increased sawing deviation If the pressure is too high then the guides will wear quickly especially the front corner of the guide and the back for a double cut saw The wear on the front corner of the guides allows the front edge of the blade to bend over slightly which has the same effect as a guide lead that changes through the shift The overall wear of the guide causes the target size to change over time This contributes directly to the Between Board sawing deviation and indirectly to the Within Board deviation BandSel calculates the Ideal or Recommended Guide Pressure and Offset as well as the Current Guide Pressure given the Current Guide Offset For users that have a Sine Bar similar to the one shown in Figure 26 BandSel calculates the micrometer settings of a 5 inch Sine Bar for both the bottom and top spans Gulet Y Guide R 12 7 e Food Speed Cung Time Design Ideal Guide Pressure 120 Ib Ideal Guide Offset 0 512 in Current Guide Pressure 88 I
32. e 48 Calculations Area Feeds and Speeds Section The Feeds and Speeds Screen is used to establish if the tooth design is suitable for the range of cuts being used For each depth of cut you enter for analysis BandSel will determine important values such as the recommended maximum feed speed according to a maximum GFI or maximum sawing deviation that you set Below is an example of the Feed Speed screen Y Gulet Y Guide Y ir root i Depth Of Cut Add Remove Save Copy Rearrange 10 0 12 0 Feed Speed Limiting Factor Depth Of Cut 10 000 in Maximum GFI 0 700 Cut Elevation 3 000 in Max Standard Deviation 0 030 in Guide Span 2g 000 n Feed Speed 338 fpm Recommended Minimum Feed Speed Minimum Bite 0 005 m Minimum Bite 25 fpm Side Clearance 151 fpm Recommended Maximum Feed Speed Gullet Overloading 340 fpm Tooth Bending 317 fpm Sawing Deviation 328 fpm Estimated Within Board Sawing Deviation 0 034 in GFI 0 694 Power 63 1 Hp Bite Per Tooth 0 067 in Figure 28 Feeds and Speeds Section Thin Kerf Technologies Inc BandSel User s Guide Depth of Cut Feed Speed Guide Span Cut Elevation Minimum Bite Per Tooth GFI and Standard Deviation Bite Per Tooth Gullet Feed Index Power Estimated Sawing Deviation Thin Kerf Technologies Inc 49 User Entries Because the Feed Speed and Guide Span may change with the dept
33. e blade is running on the wheels including idling time If for example the teeth are sharpened at the end of every shift but the gullets are ground only after every second shift then the Time Between Saw Changes is the running time for two shifts Thin Kerf Technologies Inc BandSel User s Guide Tensioning Thin Kerf Technologies Inc Tensioning puts tensile stress on the back and front edges of the blade Increasing the stress on the gullet line increases the stiffness of the blade but also increases the likelihood of gullet cracking Assessing the level of Tensioning in a bandsaw is not an exact science Factors such as tire line width the amount of damage that occurs to the blades etc need to be considered It is difficult to say exactly what the stresses are in the blade so BandSel uses the terms Low Medium and High to describe the amount of tensioning Section 7 describes how to assess the level of tensioning As a quick guide for wide bandsaws use the following Low Tensioned to a 60 ft or 80 ft circle gauge Medium Tensioned to a 40 ft circle gauge with no light showing The blade lies flat on the levelling slab High Tensioned to a 40 ft circle gauge with light showing The blade may have to be held flat on the levelling slab To be on the safe side it is advisable to see what the effect of one higher level of tensioning is on the Fatigue Cracking Index 35 BandSel User s Guide Wheel Diamete
34. e performance parameters that tell how well the saw will cut The data can be changed which allows the user to investigate the effects of changing one or more variables These changes can be saved or stored in a new Variation for future reference The data and calculations for the variations can be printed or written to a file for inclusion in reports BandSel User s Guide Thin Kerf Technologies Inc SECTION 2 INSTALLING AND RUNNING BANDSEL If there are problems installing or running BandSel on your computer call Thin Kerf Technologies at 1 800 6363 TKT or email us at thinkerf Q thinkerf com System Requirements Pentium 75 MHZ or higher processor Operating system MS Windows 95 98 Hard drive 10 Mb free space s Mb RAM minimum 16 Mb of RAM recommended CD ROM drive VGA or higher resolution monitor Super VGA recommended Minimum 600 x 800 resolution Installing BandSel 1 Close all applications currently running on Windows 2 Insert the BandSel CD into your CD ROM drive 3 Open Windows Explorer 4 In Explorer double click the drive for your CD ROM to see what is on the CD On the CD find the file setup exe Double click the file and the setup routine will start 7 Please follow the instructions on the screen to finish setting up BandSel OO BandSel User s Guide NOTE NOTE Thin Kerf Technologies Inc During setup you may get the following message Setup cannot continue because some system file
35. egistration window will open up asking the user for the Company and Division Name and the Serial Number You find all this information on the BandSel CD label refer to Figure 3 Important You must enter the Company and Division Name exactly as shown on the CD label This includes punctuation capital letters and spaces Thin Kerf Technologies Inc BandSel User s Guide Enter Registration Information 10 The program has detected that either you have not registered the program yet or the registration information has been changed so that the serial number is no longer valid Please reenter the Company Name Division and Serial Number that is on the Disk Label NOTE Use exactly the same upper and lower case letters and all punctuation m Registration Information from Disk Label Company Name Serial Number fi 23456 Division Thin Kerf Technologies Inc Bruce Lehmann Register Figure 3 You must register your copy of BandSel before using the program Enter the Company Name Division and Serial Number as indicated on the CD label Cancel Registration 5 After you entered the information press the Register button to finish the process 6 A window will open to tell you if you registered the program properly or not If it was successful pressing the OK button would automatically start the program If it wasn t registered right press the OK button so that you can try ag
36. erf Technologies Inc 39 Hook Angle Back Clearance Angle 1 V Hook Length m Y Z Gullet Radius Figure 19 Tooth Dimensions The gullet area generally determines the maximum feed speed The Actual Gullet Area can be found by tracing the tooth pattern onto grid paper and then counting the number of squares BandSel calculates an area based on the Armstrong Formula D tooth shape and displays it in this section You may choose between either values to be used in the calculations If you would like to use your own area in the calculations click the option button labelled Enter Own Area Then enter the gullet area in the field provided To use the Armstrong Formula D click the option button labelled Use Armstrong D Formula Gullet cracks start from the scratches and burrs produced by the grinding wheel The effects of these stress raisers are difficult to quantify BandSel uses a Gullet Condition Factor that rates how the condition of the gullet affects the stress at the bottom of the gullet Section 7 describes in more detail the factors that affect the Gullet Condition Factor but as a quick guide use the coarseness of the grinding wheel Fine Medium and Coarse for setting the Gullet Condition Factor BandSel User s Guide Top Span Bottom Span Maximum Span Minimum Span Current Guide Offset Thin Kerf Technologies Inc 40 User Entry Guide Location Sec
37. fect Sawing Accuracy Sawing accuracy is determined in order of importance by 1 how well the wood is fed and controlled during the cut 2 the size of the cutting forces that cause the blade to bend 3 the ability of the blade to resist bending If the condition and alignment of the feed system is poor it is a waste of time and resources trying to make a thin kerf bandsaw run Also as the blade becomes thinner and more fragile it can BandSel User s Guide Deep cuts Thin Kerf Technologies Inc 55 not withstand imbalanced or the occasional large cutting force due to inconsistent tooth preparation Having a thicker blade is the common method for compensating for but not fixing these two problems The amount of sawdust spillage affects sawing accuracy This is generally quantified with the Gullet Feed Index GFT which is the defined as Bite x Depth of Cut Gullet Area GFI If the GFI is greater than 0 6 then sawdust spillage begins to have an effect on sawing deviation See Diagram 6 If the GFI gets to be 0 7 then the sawing accuracy is becoming unacceptable In general the side clearance should be smaller than the bite per tooth to avoid sawdust spillage However it is also important not to have too small a side clearance The Minimum Critical Side Clearance is different for each Bandmill but is generally between 0 020 and 0 025 inches If the side clearance is smaller then the sawing deviation will increase For
38. file so that you can use it in any word processor and can be used in your reports Windows Menu Cascade Organizes all the Design Screen one on top of the other with just the top of the windows in view Tile Horizontally Organizes all the Design Screens horizontally Tile Vertically Organizes all the Design Screen vertically Under the Tile Vertically option BandSel provides a list of all opened Variations Use this list to bring a Variation to the top of the screen Thin Kerf Technologies Inc 26 m E suoTrasTnoTe o VT pesn astm 4 T X303 HION Tt 900 weds mo 468 T anod TeA30I wr 08070 weds dol dg asnod savy xuq ets ut q 303 shutajaes siNu4HzdlnDOsu 4800 dH 0 stzrroeds Ut SEO a siic pin queaang pea uaisjson setoeds poo AT 22 amsssrd Bprnb us11 5 54212484044 4004 qt 021 4 T PL ur 2150 sprnb Te pr Surpuras u 51 anod Bap 19670 ua BusT Moor q TTTO4 ur Goose weds Wo 470g 93670 v xv AIIM d v TTKXCH O00 ZE uwds dor were gapni Tenqoy poop 1f6T3Tpt5 Tasty t SA 0 SNTPEI TMI VT 000781 weds mureru Bep TT STAws souezuey oT ur 000 nt wwds unurxwvu bsp pc xocH pgs pesds ur i8 0 qidep 3a m3 GT o Toova don OOO yoatd HI 00051 rezus peseorpul Ut ZT 1 TY ma s s UTEAAS ug og0 0 apres UE 0724
39. g Saw Speed Blade speed is the only calculated number in the User Entry Area BandSel User s Guide 38 User Entry Tooth Design Section The Tooth Design Screen asks for information on the tooth dimensions and the gullet preparation The tooth dimensions are shovvn on the follovving page C Program Files BandSel_Win Data TUTORIAL sel File Variations Window Print Help Guide Wood basi Location Properties escription Blade Design Ponca 3 Side Elearance 0 015 in Tooth 2 000 in Gullet Depth g 875 in Hook Angle 30 degrees Back Clearance Angle i2 degrees Gullet Radius 0 375 in Grinding Fine Medium Coarse Gullet Area Armstrong 0 966 sq in C User Entry 0 966 sq in Figure 18 Tooth Design Screen Tooth Pitch The variables of the tooth geometry are shown in Figure 19 These 7 SE variables are the Tooth Pitch Gullet Depth Hook Angle and the ud 7 Awk Back Clearance Angle For the Armstrong Formula D tooth shapes Gullet Radius the radius at the bottom of the gullet is equal to half the width of the grinding wheel Also shown in this diagram is the Hook Length Side Clearance The Side Clearance is the distance that the tip of the tooth protrudes from the one side of the saw plate Kerf is the sum of the plate thickness and twice the side clearance Thin Kerf Technologies Inc BandSel User s Guide Actual Gullet Area Grinding Factor Thin K
40. h of cut this information is required The program will not accept a Guide Span outside of the maximum or minimum guide span entered in the Guide Location Screen The Cut Elevation is the distance from the bottom guide to the bottom of the log or cant This locates the cutting zone i e whether the cutting is taking place close to the bottom guide or near the middle of the span The smallest bite you want to use to avoid making fine sawdust BandSel recommends three maximum feed speeds Two of them are dependent on what you enter as a maximum GFI and standard deviation We recommend that you first start out with a GFI of 0 6 to a maximum of 0 7 For larger depth of cuts you can go as high as 0 8 The maximum standard deviation will depend on the maximum allowable for your sawmill Calculated Values The bite per tooth influences the quality of the surface finish The wood is considered to be rough when the bite per tooth is greater than 0 050 inches The Gullet Feed Index GFT is the volume of solid wood removed and stored in the gullet divided by the volume of the gullet From the graph on the following page you can see that GFI has a significant affect on sawing deviation If the GFI is larger than 0 7 the sawing deviation will be large due to the problems caused by sawdust spillage As stated before the GFI should be less than 0 7 and preferably below 0 6 Power requirements are calculated for each feed speed The within bo
41. ially to tensioning and wheel condition If BandSel still indicates that your design should not have problems then check some basic factors of sawing Bite per Tooth Measure the bite per tooth If the measured bite is different than the bite calculated by BandSel then the input value for feed speed or blade speed is incorrect The most accurate method is to mark the distance of 10 bites and measure this distance with calipers The bite is quickly calculated as one tenth the caliper reading Motor power Measure the power with a recording wattmeter This would give some indication of the cutting forces and the specific gravity This can be important if the wood supply changes Strain Measure the strain with a load gauge Also ensure that the top wheel moves upward as the wheels come up to speed This gives some indication that the strain system is working As a quick check of the strain pull on the blade to get a feel for the blade stiffness Compare the stiffness to that of another Bandmill that is cutting well If the problem is still not solved then it is probably something that BandSel was not designed to handle such as Alignment Feed system problems Worn or inadequate wheel scrapers Dead or sticking strain system Washboarding 63 m PUS pi youd 1001 y 10 p ds opina np yi 2718 JOJOUI oseoJour JI 10 p ds poo sonpoy
42. igure 21 Guide Spans 4 BandSel User s Guide Frozen and very dry vvood Thin Kerf Technologies Inc 42 User Entry VVood Properties Section Band Sel provides a list of commercial hardwoods and softwoods including tropical woods along with their specific gravities Specific gravity is used to calculate horsepower for your entered feed speeds It is a measurement of the density of the wood Density can be given as so many pounds per cubic foot or kilograms per cubic meter Specific gravity is just the density of wood divided by the density of water If the wood s specific gravity is less than 1 00 it will float In this tabbed section the first list provides the names of the generic species Selecting one will provide in the second list the wood species name If you select a species name the bottom of this tab will display what you have chosen and its specific gravity BandSel provides an average for the specific gravity The actual number can differ by at least1096 This program allows you to use your own wood species name and specific gravity Just make the changes to the Wood Species field and the Specific Gravity field Cutting frozen wood or very dry wood is more difficult than cutting green wood Checking this box has the same effect as adding 10 to the specific gravity EMI 213 Vaso Wine Eri WawdSpener westen rod cedat Somir Geevity EN Frome ai Ver Dy Musi F
43. il the screen area is 1024 x 768 A The screen area depends on the user As you increase the area the smaller the writing will appear on the screen If you prefer smaller lettering you can drag the slider as much as you want to the right 8 After selecting your screen area press the Apply button 9 A new window Display Properties will pop up Press the OK button Your screen should black out as Windows is resizing your screen 10 When the screen reappears press the Yes button on the new window that has popped up BandSel User s Guide 11 Press OK on the Display Properties vvindovv 12 Center the screen Adding a BandSel Icon to your Desktop 1 Open up your VVindovvs Explorer 2 Find the file BandSel Win exe in your hard drive If you did not change the directory where BandSel would be installed during the installation procedure this file would be in the directory C Program Files BandSel_Win 3 Click the file once 4 On the File menu click Create Shortcut 5 You will see a new file named Shortcut to BandSel_Win exe Drag this file onto the desktop Registering BandSel You must register BandSel before you use the program The registering procedure will start when you first try to run the program 1 Click the Windows Start Menu button Click the Programs option and move the mouse to the BandSel for Windows option 3 Click the new option also titled BandSel for Windows 4 The r
44. in 36 BandSel User s Guide Condition of the Wheels Tare Power Saw Speed Thin Kerf Technologies Inc 37 indicator If this is the case then the actual strain on the blade is less than what is shown on the indicator and the actual blade stiffness will be less than what is calculated by BandSel If the strain is zero when the blade is loose then the weight of the top wheel is accounted for and zero should be entered Dead weight lever arm systems do not account for the weight of the top wheel unless separate counter weights are used to balance the weight of the top wheel The Condition of the Wheels affects the likelihood that gullet cracking will occur Wheels that have too much crown are not round or are not concentric to the arbour put extra stress on the blade Assessing the wheel condition is not a precise science so BandSel uses the simple terms Excellent Good Fair and Poor to describe the wheel condition Depending on when the wheels were last ground use Fair or Good to rate the wheels Section 7 describes how to assess the condition of the wheels in more detail The Tare Power is the amount of power lost due to the friction from the blade running over the guides belt losses windage etc Tare power increases with the size of the bandmill Typical values are 10 to 15 hp for a 5 foot bandmill and 15 to 25 hp for an 8 foot The tare power for a bandmill can be measured with a wattmeter when the bandmill is idlin
45. in system Rubber Indicated strain 15000 Ib Top wheel weight 0 Ib Wheel speed 600 rpm Maximum span 19 in Minimum span 18 in Wheel condition Good Top span 20 0 in Bottom span 20 0 in Tare power 10 Hp Ideal guide offset 0 160 in BLADE Thickness 0 042 in Width 6in Discard width 5in Blade speed 5655 sfpm Tensioning Medium Blade length 18 5 ft Shift time 4 hrs Depth of Cut in Feed Speed fpm Cut Elevation in Guide Span in Minimum Bite Per Tooth in 65 TOOTH Side clearance 0 025 in Pitch 1 5 in Gullet depth 0 5 in Hook angle 30 deg Back clearance angle 12 deg Gullet bottom radius 0 25 in Grinding Medium WOOD PROPERTIES Wood Species Western Red Cedar Specific Gravity 0 330 1 2 2 10 1 Limitations GFI Percentage Of Cut Length Cut Time min Thin Kerf Technologies Inc Limitations Standard Deviation 150 2 35 EM 0 65 0 65 s 5 50 115 6 0 01 0 01 5 3 15 23 33 13 04 BandSel User s Guide 66 TEMPLATE NAME 4foot smp DESCRIPTION 4 Foot Bandmill BANDMILL TOOTH Wheel diameter 48 0in Side clearance 0 020 in Strain system Air Pitch 1 5 in Indicated strain 8000 Ib Gullet depth 0 5 in Top wheel weight 0 Ib Hook angle 30 deg Wheel speed 600 rpm Back clearance angle 12 deg Maximum span 10 0 in Gullet bottom radius 0 250 in Minimum span 18 0 in Grinding Medium Wheel condition Good Top span 25 0 in Bottom span 24 0in WOOD PROPERTIES Tare power 15 Hp Wood Species Western
46. ing Data s coo twee edn eae ars tr ies dare oe dii Vb een coe eee 29 Invalid Data s bo aa a ik Rage baa b l n b zada 30 User Entry Bandmill Design Section 35 User Entry Tooth Design Section iisque Ra aaa REPE ARES LEY 37 User Entry Guide Location Section S aa o a 39 User Entry Wood Properties Section 22 41 User Entry Description Section 22 L a R da eee ea REA ETE 42 Calculations Area Gullet Cracking Section 43 Calculations Area Guide Pressure Section 44 Calculations Area Tooth Design Section 46 Thin Kerf Technologies Inc BandSel User s Guide Calculations Area Feeds and Speeds Section 47 Navigating Around the Feed Speed Screen 50 Calculations Area Cutting Time suisse IR ACE Lew Werke heeds 50 Calculations Area Power edecek ee REQUE E 52 The Basics of Bandsaw Operation and Design 53 Trade offs oce nan Saha dares eid eie RV e Ba a mea EEE deii desque 53 Factors that affect Surface Roughness 55 Factors that affect Blade Stiffness RICEVERE 55 Factors that affect the Cutting Force and Power 56 Factors that affect Gullet Cracking ius eR EE ENTERS SS
47. is one reason why the motor size should be about 20 30 larger than the calculations indicate Basic rule Any change that increases blade stiffness will increase the likelihood of cracking Thin Kerf Technologies Inc Factors that affect Gullet Cracking The largest stress in a blade results from the blade bending over the wheels Larger wheels reduce this stress but the blade thickness has a greater effect For example reducing the blade thickness by 1046 reduces the bending stress by 3396 The stress from Bandmill strain is reduced by 10 but the net result is a 23 reduction in the sum of these two stresses The Bandsaw Fatigue Index provides an indication of how changes in blade dimensions strain strain system wheel speed grinding finish and wheel condition affect the fatigue life of the blade BandSel uses the discard width of the blade for the fatigue calculations because the narrower blade has greater stresses BandSel User s Guide Thin Kerf Technologies Inc 58 SECTION 7 ASSESSING BLADE AND BANDMILL MAINTENANCE There is very little information or formulas available for assessing the condition of the bandmill and blades This section provides some guidelines and a checklist for such assessments Guidelines for Assessing the Condition of the Wheels The factors involved are Crown Concentricity Balancing The condition of the wheels affects the stresses in the blade which in turn affects the s
48. learance enter the field with the label Side Clearance Change the value to 0 025 and press the Enter key Increasing your side clearance by 0 010 inches will increase you kerf size to 0 113 inches It is important to press the Enter key Otherwise BandSel will not perform any recalculations Pressing the Tab key will do the same thing and also move the cursor to the next field Double clicking a field will select the number in that field If you do this BandSel will delete this old number as you type in a new one Sometimes you change values by using option buttons like the Tensioning options in the Blade Design section You select BandSel User s Guide 31 one of the four choices by clicking the buttons next to the label Invalid Data BandSel will generate error messages if you provide invalid data This is most likely due to non numeric entries or outside of the allowable range for that field Table 1 lists all the user entries Limitations and units are also provided where applicable You will not be able to enter another field until you change the value BandSel will also not let you use the menus if you provide bad data Thin Kerf Technologies Inc BandSel User s Guide BANDSEL DATA SHEET THIN KERF TECHNOLOGIES NC BANDMI LL Wheel diameter Strain system ndi cated strain Top uheel vei ght Wheel speed Maxi mum span Gui de span Mi ni mum span Wheel condition Top span Bottom span Tare power
49. m the current Variation s feed speed calculations Thin Kerf Technologies Inc BandSel User s Guide Thin Kerf Technologies Inc 52 Calculations Area Cutting Time The information from this screen is used to optimize production by minimizing the time to cut 10 000 lineal feet of material of the different depths listed in the Feed Speed tab You enter the percentage of pieces of each depth of cut and BandSel uses the feed speeds to calculate the time needed to cut these pieces This information is used for several situations e the log or piece size distribution has changed e you want to select the tooth pitch that will result in the best overall production No one blade design is optimal for all cutting conditions For example if the depths of cut are small then a small pitch works well However if the percentage of deep cuts increases then it may be better to increase the pitch Otherwise the deep cuts will take too long to cut However the decision is based on how much of each depth is to be cut To make these comparisons you need to know the time needed to cut all the pieces Note The total cutting time assumes there are no gaps between pieces as they are fed into the bandsaw However if you assume that the time between pieces is constant then the results are still useful When you add a depth of cut its initial cutting percentage is set to zero Once you are in this screen you won t be able to leave it if the t
50. ologies Inc BandSel User s Guide TEMPLATE NAME 6foot smp DESCRIPTION 6 Foot Bandmill BANDMILL TOOTH Wheel diameter 72 0in Side clearance 0 035 in Strain system Air Pitch 1 75 in Indicated strain 15000 Ib Gullet depth 0 625 in Top wheel weight 0 Ib Hook angle 30 deg Wheel speed 530 rpm Back clearance angle 12 deg Maximum span 30 0 in Gullet bottom radius 0 375 in Minimum span 18 0 in Grinding Medium Wheel condition Good Top span 32 0 in Bottom span 38 0in WOOD PROPERTIES Tare power 15 Hp Wood Species Western Red Cedar Ideal guide offset 0 512 in Specific Gravity 0 40 BLADE Thickness 0 0625 in Width 9 0 in Discard width 7 0 in Blade speed 9990 sfpm Tensioning Medium Blade length 31 00 ft Shift time 8 0 hrs Depth of Cut in Feed Speed fpm Guide Span in Cut Elevation in 0 005 16 Minimum Bite Per Tooth in 0 005 Limitations GFI Limitations Standard Deviation in Percentage Of Cut Length Cut Time min Thin Kerf Technologies Inc 68 BandSel User s Guide TEMPLATE NAME 8foot smp DESCRIPTION 8 Foot Bandmill BANDMILL TOOTH Wheel diameter 36 0 in Side clearance 0 025 in Strain system Rubber Pitch 1 50 in Indicated strain 15000 Ib Gullet depth 0 500 in Top wheel weight 0 Ib Hook angle 30 deg Wheel speed 600 rpm Back clearance angle 12 deg Maximum span 19 0 in Gullet bottom radius 0 250 in Minimum span 18 0 in Grinding Medium Wheel condition Good Top span 20 0 in Bottom span 20 0in WOOD PR
51. oods ur D n cy edg aping ut n luoncaz 3 m ul 000 0L 3n5 10 d q ul 0 0 0 prepuss Xe yv nozin 145 unun pi 10198 4 fumu laz l oo abuenesy amp do 2AeG ACM H ppiy 1n 10 d q uisa ainssaiy uya ELCHE NL Ix Ju pma y n Jas jeuojn Fee spue gys li 4 ure 15014 7 99001 p d mes 19004 _ nj poog m f x3 waysig wrens suonmpuo pay dH q q urd ul usaq yoo s yesi Pasds eau 000 Z2 q nd 31e ufaq aeu do 000 URNS 1ajauretq aayy Soipodeig ugipea30 pons apmog 2 1 dap jum epum stone s 1 All input screens and worksheets have been incorporated into the Design Screen igure F Thin Kerf Technologies Inc BandSel User s Guide Machine File Overview of How to Use BandSel BandSel is a database program and a calculation program The BandSel database stores the dimensions operating settings and feed speeds for each bandmill chosen for analysis These files are called Machine Files and each has a name that the user supplies For instance the files could be named HeadrigA Headrig A S Resaw South Resaw HorizSix Horizontal 6 Quads Quad bandmills NewResaw New resaw The last file NewResaw is for a bandmill that is being considered fo
52. opina sonpoy pu sjo a uoDnrpuoo yooyo Suruorsuoj urens ssouysnol DOVJANS np i ooutieo o OPIS IY osearoug eouteo opis v oonpos youd q100 Jo poeds osearouj WIENS v 10 JOSJJO 8 oseo1oug fins 5 JO p ds p y IMPA p ds Jo y y sonpoy ueds opina oq sonpoy SSOUYSTY ope q JO Suruolsu WENS BandSel User s Guide SUIPULIS pue uoneved ud 11003 uoAoun IO 1100 T d fiq oSv p ns uo ainssaid yonu oo sey operq MO 00 ST nbuo 10 Jamod 1010 A S pIn56 MES Surpuoq WOT ss ns MBS UI SOSSOTS QOULIVIIO OPIS ROD umnulurx opg aourieayo p s uey sso diya s p ns wo Leme p find mes ege ds jsnpmes 9210 3umn SSOUJJNS MES 11001 r d mss ld pinr mss ld n neq Aespueq ooueIe9 pis 11001 r d mss ld x pul poo PMO UOTE FUMES PHO uonnjos pue uro qoq espueg E AQEL ooepmns usno l JOM OpInS 88 80111238 MES SupyoeT VIMO 801 485 USI Thin Kerf Technologies Inc BandSel User s Guide Thin Kerf Technologies Inc APPENDIX A TEMPLATE FILES 64 BandSel User s Guide TEMPLATE NAME 3foot smp DESCRIPTION 3 Foot Bandmill BANDMILL Wheel diameter 36 in Stra
53. otal cutting percentage does not equal to 100 BandSel will alert you if the percentage is not 100 Bullet Guide E Tooth Feed Speed Cuting Time Depth Of Cut in Percentage of Cut Length Feed Speed fpm Cut Time 6 000 50 0 281 17 29 10 000 30 0 338 8 88 8 000 20 0 281 7 12 100 0 Total time for 10000 lineal ft 33 79 min Figure 31 Cutting Time Screen BandSel User s Guide 53 Calculations Area Power The power value in this section is the largest calculated power for all the depth of cuts Figure 32 Power Screen Thin Kerf Technologies Inc BandSel User s Guide Thin Kerf Technologies Inc 54 SECTION 6 THE BASICS OF BANDSAW OPERATION AND DESIGN This section provides 1 Information on bandsaws that will help the user to understand the inner workings of BandSel 2 guidance on selecting and making successful improvements to Bandmill Trade offs Bandsavv design involves trade offs The ultimate thin kerf bandsaw will not have the lowest maintenance costs while a high production mill will require a thicker blade that can withstand the abuse The operating factors are production recovery sawing accuracy maintenance costs and surface finish To obtain the best balance of these factors involves trade offs about saw design and maintenance The decisions are related to tooth design and sharpness cutting forces blade stiffness blade stresses and gullet cracking Factors that af
54. ou want to read and press the Display button About Provides copyright information and the version of BandSel you have Help Topics BandSel Help Contents Index Find Click a book and then click Open Or click another tab such as Index e System Requirements and Installation Instructions e BandSel Tutorial Print Cancel Figure 13 The Help screen BandSel User s Guide Thin Kerf Technologies Inc 28 SECTION 5 DESIGN SCREEN This section provides 1 Detailed definitions of the input variables 2 Instructions for moving around the Design Screen As you create new Variations and view them each Variation will have its own Design Screen window Here you can make changes to your bandsaw properties such as blade thickness and operating parameters such as guide span Calculated values such as GFI and kerf will automatically reflect the changes you have made The Design Screen is divided into two tabbed sections the User Entry Area on the left and the Calculations Area on the right This chapter will first provide a brief description of both areas and then a detail explanation on each tabbed section Please refer to Figure 14 throughout this section The Master Variation you see in the diagram is from the Tutorial file The User Entry Area Other than operation parameters for feed speed calculations values required by the users are displayed in the User Entry Area The User Entry
55. ovided in Appendix A and you should choose the one closest to your bandsaw This will cut data entry time in the future If you don t select a template the first one in the list will be used Use the mouse to select a template Select Template Select Template Portable smp Enter Description For Master Variation Center Creator Raphael Figure 7 Choosing a template entering a description and the creator s name Step 3 optional Entering A Variation Description Although optional we advise that each variation have its own description For instance our Tutorial Machine file may have Thin Kerf Technologies Inc BandSel User s Guide Step 4 optional Step 5 Step 6 Step 7 Step 8 Thin Kerf Technologies Inc 19 the following Variations Master Master Strain Strain increased 1000 Ib Strain2 Strain increased 2000 Ib Faster1 Feed speeds increased 1096 Ga 15 15 ga plate Move the cursor with the mouse to this field if you want to enter a description to this Machine File This field is limited to 60 characters Anything after that will not be included in the description of this Machine file Entering a Creator s Name You also have an option to enter the creator of this Machine File This field is limited to 60 characters After entering all three fields press the Continue button to enter the next window or the Cancel button to exit Selecting the Machine
56. ows On the File menu you will find the Close option Choose this option to close this Machine file If you made changes to a Variation but did not save it BandSel will ask if you want to save the changes before closing the file Step 9 Exiting BandSel The Exit option is also found in the File menu Use this to quit BandSel Thin Kerf Technologies Inc BandSel User s Guide Step 1 Thin Kerf Technologies Inc 15 SECTION 4 MANAGING YOUR FILES AND VARIATIONS This section provides 1 Detailed definitions on menu options on the BandSel main screen Instructions for creating a new or opening a Machine File Saving your work Instructions for printing reports Instructions for accessing the Help Screens S 22 The Main Screen You reach the Main screen after you have created or opened a Machine file Below is a description of all menu options available for the Main screen Some of these options would be described in further detail if needed later in this section These menus are all located on the top of the Main Screen As you use this software you will realize that at times some options would not be available For example the Open and New option in the File Menu will not be available when you already have a Machine File opened You must close or delete the file before you open or create a new one The first part of this section will show you how to open or create a new Variation Then it
57. p Wheel 35 Feeds and Speeds Section 47 Wheel Diameter and Wheel Speed 5 Adding a depth of cut 50 Bandsaw Fatigue Index 43 56 60 Bite Per Tooth 48 Warnings uec y 43 Calculated Values 48 Bandsavv Load Index 55 Cut Elevation epe v ker 48 BFI Depth of exert ES 48 See Bandsaw Fatigue Index Estimated Sawing Deviation 48 Bite per tooth 60 Feed Speed reri ok RR fuf 48 Blade yaza aaa s dee apt 27 GE p s ar 48 Discard vvidth 33 Guide Span 324 Ben eu e eats 48 Stiffness sose ne epee evi 55 Gullet Feed Index 48 Tensioning ive eem oe 33 Minimum Bite Per Tooth 48 Thickness SES x 33 Navigating Around 50 Width Ie ted dut eu as 33 D R pi ERO a 48 Blade Recommended Maximum 49 Lengths o see tere 33 Recommended Minimum 49 Blade Design Section 32 Saving Your Changes 50 Blade Length i 23 o 33 Standard Deviation 48 Blade Thickness 33 User Entries 48 Blade Width 33 Files Discard Width 33 Machine vee es y 5 Tensioning e 34 Master 225 5 a 5 Time Between Saw Changes 33 Variation byes RSEEP LAO 6 Blade stiffness 23 GHI Bottom span 39 See Gullet Feed Index 48 Crea
58. r and Wheel Speed Strain System Design Strain Weight of Top Wheel Assembly Thin Kerf Technologies Inc User Entry Bandmill Design Section 24 E BandS elWindowsMod D ata tutorial sel Master He Variations Window Print Help Guide Y Location gt Bandmill Blade Design Design Wheel Diameter Wheel Speed Strain Top Wheel Weight Tare Power Wheel Conditions Strain System C Excellent C Air Good C Lever C Fair C Hydraulic C Poor Rubber L Saw Speed 3770 sfpm Figure 17 Bandmill Design screen BandSel uses Wheel Diameter and Wheel Speed in the calculation of blade speed guide pressure blade stiffness and the bending stresses in the blade that affect the Fatigue Cracking Index The Strain System Design has a slight effect on blade stiffness as long as the top arbour is not dead When the top wheel does not move the actual strain in the blade decreases as the blade comes up to speed Dead weight lever systems are usually satisfactory but may loose their freedom of movement as the pivot edges wear In BandSel strain is the force shown on the strain indicator The indicator could be an electric load cell a modified pressure gauge or the total weight on the end of a lever arm multiplied by the leverage factor Depending on the construction of the bandmill the Weight of the Top Wheel Assembly may not be accounted for by the stra
59. r purchase See Figure 2 below BandSel T 0 3 0 HeadrigA S Resav Quads HorSix NewResaw 5 0 0 5 0 5 0 0 5 0 Machine Files x Master Strainl Strain2 Variations Fasterl Faster2 Ga_15 Figure 2 Examples of Machine and Variation files Master File Within each Machine File there is one copy of the bandmill data for the machine as it is now This is called the Master Variation There is no need to re enter all the data Since it is desirable not to change this information unless a permanent change is made to the machine BandSel works with copies of the data in the Master variation This allows the user to investigate the effect of changes without worrying whether the data will be lost Each of these copies is called a Variation and is stored within the Machine File under a unique name and description For instance the HeadrigA Machine File may have the following Variations Thin Kerf Technologies Inc BandSel User s Guide Variation File Thin Kerf Technologies Inc Master Strainl Strain2 Fasterl Faster2 Ga 15 Master Strain increased 1000 Ib Strain increased 2000 Ib Feed speeds increased 1096 Feed speeds increased 596 15 ga plate The data for the Master File is entered in the Design Screen which asks the user for all the information that describes a bandmill Operating parameters you have entered through the Design Screen are used to calculate th
60. rsion of BandSel incorporates several years of experience with Load Index on machines ranging from portables to nine foot headrigs so the user now sees the within board sawing deviation the most common measure of saw performance Saw filers know how to increase saw stiffness but they also know that to increase the stiffness will also increase the likelihood of gullet cracking BandSel provides a Bandsaw Fatigue Index to warn when the stresses in the saw are becoming too large On the other hand if the Fatigue Index indicates low stresses then there is an opportunity to make changes that increase the stiffness and reduce sawing deviation without the danger of developing gullet cracks within an unacceptably short time in operation BandSel provides the capability to investigate trade offs and to look for windows of opportunity without the cost and risk of mill trials BandSel tells you which options should work and which will not BandSel s Design Screen feature is a tool for investigating the compromises such as that between kerf and sawing accuracy BandSel User s Guide Thin Kerf Technologies Inc Purposes and Uses of BandSel 1 To make a computer file that stores important information for each bandmill This information can be printed for your records work orders or reports 2 To check if bandmill operating conditions and design are within acceptable limits 3 To look for opportunities to reduce kerf or increase throughput 4
61. s are out of date on your system Click OK if you would like setup to update these files for you now You will need to restart Windows before you can run setup again Click Cancel to Exit setup without updating system files Click the OK button so that BandSel can update your Windows files Your computer will automatically restart and you will have to start the installation procedure over again Screen Size BandSel displays a lot of information on the screen We recommend that you should run your monitor at 1024 x 768 with a minimum of 800 x 600 To check what screen area your monitor is at please do the following 1 Click the Windows Start button Select the Settings option 3 From the Settings menu select the Control Panel option You should now be in the Control Panel window 4 Find the Display icon and double click it so that the Display Properties window will appear In the Display Properties window select the Settings tab 6 You should see the Screen Area box The screen area is fine if the number is greater than or equal to 1024 x 768 pixels If this is the case press the Cancel button and proceed to the next section Starting BandSel If not please continue with these instructions 7 Using the mouse you can change the screen area by clicking the left mouse button on the slider and dragging it left or right You should be dragging the slider to the right to increase the screen area Drag the slider unt
62. s Window Print Help Guide Wood bescripti Location Properties escription i Blade Thickness n 063 in Blade Width 3 000 in Discard Width 7 000 in Blade Length 32 000 ft Saw Run Time B hrs r Tensioning C None Low Medium C High Figure 16 Blade dimensions Figure 15 Blade Design Screen Thin Kerf Technologies Inc BandSel User s Guide 34 Blade Thickness Blade Width Discard Width Blade Length For reference Table 2 lists the thicknesses for gauges of plate Birmingham Gauge Plate Thickness Inches Table 2 Plate Thickness for Birmingham Gauges The Blade Width is measured from the back of the blade to the bottom of the gullet This is different that the usual way that blade width is defined by saw filers Usually the blade width is measured from the tooth tip The Discard Width is measured from the back of the blade to the bottom of the gullet It is the width of the narrowest blade run on the Bandmill and is used as the width of the blade for the fatigue calculations The Blade Length is the distance around the blade from one point back to itself An indirect measurement of blade length is to multiply the tooth pitch in inches by the number of teeth on the blade This number divided by 12 gives the blade length in feet Time Between Saw Changes The Time Between Saw Changes is the number of hours between regrinding of the gullet that th
63. ses 7 Tooth sharpness Sharp teeth and fewer grinding errors reduce the adverse effects of other factors that increase the cutting forces This also results in less benchwork Factors that affect Surface Roughness Surface roughness is determined by the bite per tooth and tooth sharpness The larger the bite the worse the surface finish Side ground teeth also produce smoother lumber The wood species also has an effect Note that if the surface becomes too rough then the side clearance is being reduced Factors that affect Blade Stiffness The factors that affect blade stiffness are in order of importance 1 Plate thickness 2 Guide span 3 Strain 4 Tensioning 5 Blade width 6 Gullet depth 7 Wheel speed and Strain system design Use BandSel to change these factors and see what happens to the BandSaw Load Index BLI A smaller BLI results from a stiffer blade Factors that affect the Cutting Force and Power BandSel User s Guide 57 In BandSel the variable that accounts for the cutting force and the power requirements is the specific gravity of the wood The higher the density the more resistance the wood will provide to the teeth In general the power consumption rises if the bite per tooth is smaller than 0 020 inches because the teeth are rubbing more than cutting a clean chip The power calculation in BandSel is for sharp teeth The cutting forces and power will increase towards the end of a shift This
64. start from tiny scratches in the surface of the gullet The smaller these scratches are the less likelihood there is of a crack starting at all or the initial growth of the crack will be so slow that the crack will be ground out during the next sharpening The most important factor affecting gullet condition is wheel grit BandSel classifies the gullet condition as fine medium or coarse A flood lubricated borazon wheel will produce a fine surface almost polished A medium surface is like a metal nail file A coarse surface is like a file for metal Cracks may also start in the burrs along the edge of the gullet Burrs are highly deformed metal with very rough surfaces that act as ideal places for cracks to start If burrs are present consider dovvn grading the grinding factor used in BandSel Changes in the metal result from the heat generated during grinding If steel is heated to a high temperature then cooled quickly it can become very brittle A brittle skin on the gullet bottom especially at the edges will crack very easily This burning of the gullet results from 1 heavy grinding 2 grinding with a dull or plugged wheel 3 high wheel speed Peening or Proctor rolling crushes the corners of the gullet bottom This results in a smooth surface and creates stresses that hinder cracking If the gullets are peened then the grinding factor in BandSel can be up graded BandSel User s Guide Indicators from BandSel Thin Kerf Te
65. tiffness and fatigue life of the blade The wheel crown should not be greater than 0 010 inches for a 10 or 12 inch wide wheel at 12 000 15 000 Ib strain Bandmill with lower strain will require more crown to ensure the tracking stability of the band on the wheels and high strain mills will have a crown of only a few thousandths of an inch If the crown is larger then the tension in the blade will have to be increased to avoid tight centered saws If the crown is not checked and corrected the tensioning will have to become so great that the front edge of the blade forms a ripple Wheel balancing has some effect on blade life but the effect will be less than the effect on bearing life If the wheel rim is not concentric then stress on the blade will increase resulting in increased likelihood of cracking Even BandSel User s Guide Thin Kerf Technologies Inc 59 though the wheel may be balanced it may not be round This out of roundness will stretch the blade once every wheel revolution and can have a significant effect on fatigue life of the blade The most likely cause of out of round wheels is aggressive grinding of the wheels If the wheel has a hard spot or the grinder is flexible then the grinding wheel will bounce Slow grinding with a motorized grinding wheel is recommended There are two checks for out of roundness 1 large counter balance masses have to attached to the wheel to obtain balance 2 the total indicator re
66. ting A New Machine File 18 Guide Location 2 l 8 27 Entering a Creator s Name 19 Guide Location Section 39 Entering a Machine Filename 19 Bottom Span 39 Entering A Variation Description 18 Current Guide Offset 39 Saving Your Machine File 19 Maximum Span 39 Selecting a Template 18 Minimum Span 39 Thin Kerf Technologies Inc 72 BandSel User s Guide Top Span aise ue ek RI ed 39 Guide Offset v Eee 44 60 Cutrent ovi x vec ERN NM 39 Guide Pressure 20 Guide Pressure Section 44 Guide Offset 26x 44 Ideal Guide Pressure 44 Sine Bar Settings 44 Guides Bottom span 39 Current offset ee 39 Offset erani sesto ed 44 Pressure x traoii 44 60 Sine bar settings 44 Top spa cube s oer 39 Wear o Oud sunur 60 Gullet POCHIIS ony Gna te ase Deedee es 58 Proctor rolling 58 G llet area ero r eine eU I a RV A 2 Actual d 38 Armstrong Formula D 2 Gullet Condition Factor 38 59 Gullet cracking 56 59 60 Gullet Cracking Section 43 Bandsavv Fatigue Index 43 Gullet Feed Index 48 54 60 Help Menu Options 26 About saa AG bakan 26 Contents cos es saa z Y 26 Pind 250 s Praet 26 index xa EAE 26 Online
67. tion The Guide Location Screen asks for information on the location and possible range of motion of the guides The locations of the guides are defined in Figure 21 C Program Files BandSel_Win Data TUTORIAL sel File Variations Window Print Help Blade Design Pommi M Tooth Design Top Span Bottom Span Maximum Span Minimum Span Current Guide Offset Figure 20 Guide Location Screen The Top Span is the distance from center of the top wheel to the top guide when the guide is in the Up position The Bottom Span is the distance from center of the bottom wheel to the bottom guide This information is needed to calculate the guide offset The Maximum Span is the distance between the guides when the top guide is in the Up position The Minimum Span is measured when the top guide is in the Down position If the top guide can not move then the maximum and minimum spans are equal The program uses these values to ensure that the cutting span entered into BandSel is within these limits The Current Guide Offset is the guide offset on the bandmill as it is now BandSel will calculate the actual guide pressure and recommend a guide offset in the Guide Pressure Section of the Calculations Area BandSel User s Guide Thin Kerf Technologies Inc Top Span Hu Top Guide in Up Position Top Guide in Down Position Maximum Span Guide Offset Minimum Span Minimum Span F
68. to find it Close Closes the current Machine File You will be asked if you would like to save changes to the Variations that are opened You cannot have more than one Machine file opened Delete Deletes the current Machine File Exit Use this to exit BandSel BandSel will ask if you would like to save any changes that you have made The Variations Menu Open Master Opens the Master Variation The Master Variation opens automatically when you create a new Machine file You won t be able to access this option if the Master Variation is already opened Open A Variation Use this option to see which Variations have not yet been opened see Figure 10 To open a Variation select the one you want and press the Open button Pressing the Cancel button would bring you back to the Main screen 22 BandSel User s Guide This option is not available if all Variations are already opened List of Variations Variation Name Figure 10 This window shows the Variations that are not opened Select the Variation you vvant to open and press the Open button Open All Variations Opens all Variations that are not opened Again this option is not available if all Variations are already opened New Variation To copy the Master as a new Variation select this option and follow these steps Step 1 If the Master has been changed but not saved you will first be asked to select one of three options Yes Save the Master
69. ult Printer Select Printer Canon Bubble Jet BJC 4200 DocuMagix File Cabinet Select FaxTalk 4 0 Printer HP LaserJet PCL Cancel Figure 9 BandSel lets you change your default printer Use this option if you vvant to change or check vvhich is your default printer The Printer Select window as shown in Figure 9 first shovvs vvhat is the default printer and then has a list of all printers connected to your printer Click the Use Default button or Cancel button if you don t vvant to change the printer To change a printer select the printer from the list and then press the Select Printer button Changing the printer while in BandSel does not make a permanent change to your VVindovvs environment BandSel User s Guide Thin Kerf Technologies Inc Other Options in the File Menu Save Saves the Machine File but does not close it Save As Saves the current Machine File under a different filename You would be asked if you want to save your changes before you save the file If you don t BandSel would make a copy of the most recently saved version of the current Machine File The window is the same one shown in Diagram 9 Save As Template Use this option to save the current variation as a template file A window will open to prompt you to enter the template name and where do put the file The default directory is Template and should be saved in here If you don t BandSel will not be able
70. w press the Cancel button to return to the Main screen After you have found the Machine File highlight it The file s name that you chose is shown in the field labelled File name Press the Open button The next window shows all the Variations for this Machine File see Figure 6 If you are not sure you have a Machine File opened the top of the Main screen will provide a full path of the current Machine File If it reads BandSel For Windows then you have no Machine Files opened 16 BandSel User s Guide 17 Hint Selecting a Machine File and double clicking it in the File List is the same thing as selecting the Machine File and pressing the Open button Step 4 Use the mouse to highlight and select the Variation you vvould like to vvork vvith and click the Open button If you press the Open button vvithout choosing a Variation the Master variation vvill be displayed List of Variations Variation Name Variation Figure 6 Select the Variation you want to open and press the Open button Thin Kerf Technologies Inc BandSel User s Guide 18 Creating A New Machine File Step 1 To start a new Machine file select the Nevv option in the File menu The window that opens Figure 7 allows you enter the new filename a brief description of it and the creator Step 2 Selecting a Template Templates are only used to supply default data The values for each template are pr

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