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M7005 Measuring Roundness

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1. M7005 Measuring roundness 8 24 Mode Roundness Registration order 18 Furthermore we assume that we have a button Start measurement that affect the 17 The rotation table has an index mark that gives a short pulse on I2 every time mark passes the sensor Measurement of a ring can then look like The part is placed on the table and centered The operator presses the Start measurement button to start the measurement The operator starts the revolution The table and detail must have time to accelerate up to steady speed so we let table spin at least 2 laps two index passages shall be detected before the measurement starts The measurement order goes high at the third index pulse The measurement is completed by fourth index pulse We fix it with a plc program Click on Edit Plc Program from the menu and the form in Figure 7 appears We input the code as shown in the picture File Help Edit r 12 signal from the rotation table I7 start measurement H11 measurement order goes high after 3 index pules and goes low when next pulse comes 7 H11 counter l7 12 3 1 Message OK Figure 7 PLC program to generate the measurement order H11 counter I7 12 3 1 When I7 goes high the counter is activated so when I2 goes high the counter counts up a step When the I2 goes high the third time the H11 goes high H11 remains high until the next pulse of 12 Save Test Sy
2. Rotations Speed r min Programed 3 00 Received 3 21 Tolerance Upper 0 050 Lower 0 050 The Meas order is given by the Meas order 12 Results R Max 0 02 R Min R Mean mean square Fi Mean arithmetic Roundness Max Min M1 Centre offset X 0 011 Y 0 020 I N Centering Figure 10 Roundness result with tolerances displayed Scale specifies the spacing between two rings in figure 10 is 10 my Centrum offset specifies how much the center of the part differ from the center of rotation In the figure the deviation of the two centers are 11 my in x direction and 20 my in y direction M7005 Measuring roundness 13 24 Sampling Frequency Programed is that sampling rate given when you put up the measurement program Received the total number of measurement values divided by the time the measurement lasted For high sample rates more than 5 times sec there will be a difference between the desired frequency and what we get It s because Windows has a minimum resolution between two time events type 16 ms M7005 translate the sampling frequency in to a time interval between two measurements Windows remake the interval to a multiple of its minimum time interval If Windows minimum time interval is 16 ms it s second smallest is 32 ms next 48 ms etc That is why the resulting frequency often is less than the desired Note A sample rate greater than 35 times sec is Windows not capable to manage R
3. Mode Mode has to be Roundness The measurement order Meas Order H1 If you want the measurement order to go high when you click on the Run button and go low after the estimated time as one revolution takes has expired the measurement order must be H If the measurement order H1 the button apy will be shown in the Roundness Graph RUN picture and the measuring start when you click on it The measurement then exit automatically when the estimated time for a lap has past Other parameters Other parameters will be set as for a common M7005 measurement program In the example the register order 12 Tolerance 0 05 etc The Ring example In Figure 6 below shows the Define Measurement Program form for the Ring example File Mastering Moreaddon EditPicProgram Spc _ Transd Meas triggs digita bit Help Measure Program common Data Value reprecentation Program name RoundnessRing _ Register order 18 Number of dec 0 001 v of dim 1 OK value limit 200 0 of tolerance width _ Absolute Relative Roundness Rotation speed 3 000 r min Samplings frequency 5 00 no sek Mastering by rotation Define dimension Rewrite Meas Rundhet gt Insert before Nan E Deb 5 Pepee Hi 0 Change Meas order Copy enabled O Show Meas Names Show all Curret Meas Options Test limits Figure 6 Measuring the program for the Ring example
4. The measurement program for the Shaft example The input Roundness below is shown if any dimension in the measurement program has mode roundness Roundness Here specifies the rotation speed in revolutions per minute how often the program will request Value reprecentation Number of dec 0 001 v _ Absolute Relative Mastering by rotation Rewrite Meas Insert before Copy Delete _ Replace Change Meas order _ Copy enabled O Show Meas Names Show all Curret Meas Options Test limits O Rotation speed 2 000 r min Samplings frequency 5 00 no sek Mastering by rotation values per second and if mastering is to be made by rotating the master a lap Samplings frequency For high sample rates more than 5 times sec there will be a difference between the desired frequency and what we get It s because Windows has a minimum resolution between two time events type 16 ms M7005 translate the sampling frequency in to a time interval between two measurements Windows remake the interval to a multiple of its minimum time interval If Windows minimum time interval is 16 ms its second smallest is 32 ms next 48 ms etc That is why the resulting frequency often is less than the desired M7005 Measuring roundness Note A sample rate greater than 35 times sec is Windows not capable to manage The time it takes to rotate a lap lap time 1 the rotation speed In the example 30 sec
5. the window is shut down and the result is reported see figure 10 Figure 9 Measurement is in progress 5 1 Centering the part About 4 of the difference between the center of rotation and the center of the part goes into the roundness ovality value The difference between the two centers is root of Center offset X center offset Y Let s say the difference between the two centers is 20 my then one should expect an error in the roundness lt 0 8 my See appendix C 5 2 Measurement with measurement order H1 the Shaft example e Center the part e Click e After the estimated time of rotating one lap has expired the measurement ends and results are reported see figure 10 5 3 Measurement with the measurement order given by a index pulse the Ring example e Center the part e Start the measurement In the Ring example o Give a pulse on I7 o Start the rotation o At the third index passage the measurement starts e The measurement ends when the next index pulse arrives e The result is calculated and reported as shown in figure 10 M7005 Measuring roundness 12 24 6 The Results 6 1 The tolerances are displayed When the tolerances are shown in the diagram the program takes it into account when the scaling is calculated File Customize Help Name RoundnessRing Meas Rundhet X Close oy yl Meas N eas Name Tolerances Scale 10 my mark Sampling Frequency sek Programed 5 00 Received 8 03
6. are reported in table form The outlook of the table is defined by the checkboxes in the Show panel PopUp menu Change Delete values Right click in first column column a popup menu which has the following options Edit After clicking on Edit you can change the measurement values in the row that is selected Save Are you satisfied with your changes and want them to be saved in the data base click on Save Delete You can delete an entire measurement whole row by using the Delete Back removes the popup menu Help This text shows up 6 4 Dimension display Meas Programs Utilities Show Tools Customize Print Applications oan r 1 15 07 01 09 50 13 Matematikforetagerjz ROundnessRing 7 01 09 50 Batch tin Bach Gp Part ID Mode Spe Meas Data Status bi 0 1 3 Pel MM O OK Figure 13 The Dimension Display picture As long as measurement order is high Dimension Display display values as the measurement formulas calculates them But when the measurement goes low and the measurement result is calculated the Dimensions Display bars shows roundness RMax RMin l e the same value as displayed in the Roundness Graph image 6 5 Print of test protocol and measurement values list By roundness measurement s graphic image drop down menu you can print a protocol from the current measurement An example can be found in Appendix A The individual measurement val
7. 1 to 5 but now for the Y direction If necessary re do the position in X led If necessary re do the position in Y led Keep on until you are satisfied M7005 Measuring roundness 18 24 9 Customize colors and fonts As for the most M7005 images and forms there are two default out looks Classic and Colored See figure 16 LJ Changes Enable To change Colours Fonts remainig objects The Diagram Mark the checkbox Change Enable Axies TheCurve Tol Hel Go back to Dimension Display a PACKUNG Put the Cursor on the Object 1E hee Bh Ls Tand to change Shift Left Mouse bottom gt Foreground colour m C 0 Shift Right Mouse Bottom gt Background Colour Alt Right Mouse Bottom gt Text Colour Alt Left Mouse Bottom gt Text Font Back to defaults Classic Colored Figure 16 Form to customize colors and fonts For any modification to be allowed you must check Changes Enabled M7005 Measuring roundness 19 24 10 To add The Roundness Button to the M7005 s button panel Add a button To add the roundness button on M7005 s button panel do the following Tools Customize Print Application Mastering Change Measureprogram Change Batch Give Measurements Give Part ID Start new Statstics Group Adjust Status and Button Panel ckup IS ot G2 Q lt 2 Click on Adjust Status and Button Panel and figure below pops up If you want to add a Command Info field to the screen
8. 6 0 015 0 014 Select Meas for Copy or Print From 1 To 150 Figure 12 The numeric values The list shows the individual measurement values radius after they are compensated for the centrum offset Note When the measurement order goes high the data buffer is cleared The previous measurement values of the previous measurement are lost If you want to save the measured values you may doing it as a text file using the File Copy to txt file is the serial number Select Meas For Copy or Print As for other table Windows you can choose which measurement values to be printed or copied either by clicking the up down arrows for From and To or use the mouse Press and hold the left mouse button pressed while you move the pointer in the column The drop down menu File has the choice Print prints the in Select Meas for Copy or Print selected values Preview and Printer setup Copy to txt file copies the in Select Meas for Copy or Print selected values Read from txt file will bring back previously saved values Show has the choice Page Header Here you can choose if you want the box with Name Batch and Show to be displayed or not Select for Copy Print You select if the panel Select Meas for Copy or Print shall be displayed or not Show options if the box Show shall be visible or not M7005 Measuring roundness 15 24 The Table The measurement values
9. Help to center a part The program has a window Figure 15 that you can use as help when you center the part The goal is to get the parts center as close as possible lt 50 my to the center of rotation You bring up the window by clicking on the button amp Centering Help to Centre Mode Absolute Absolute Figure 15 The centering help image If you click on the Zero button the displayed value is reset and all subsequent values are calculated on the basis on the zero value Shown value current transducer value the transducer value at the zeroing Clicking the Absolute button the transducer value is shown as it is You choose witch transducer you want to display by the up down arrows To center a ring An appropriate approach to center the part as in Ring example is after you put the part on the table as near the center as you can to do it in two steps First you center the part in one direction here called X direction and then you center it in a direction here referred to the Y direction at a right angel from the first Centering in X direction 1 Zero the output 2 Turn the part a half turn 3 Notice the value 4 Move the detail in the X direction half the indicated value On Figure 15 shows the value after the turn we must move the part so the image shows 8 my 5 Jump till 1 So keep on until you are satisfied then turn the part one quarter turn centering in the Y direction and repeat points
10. Matematikf retaget jz 150702 SJn www M7005 metem se M7005 Measuring Roundness File Customize Help Nene RoundnessRing Mess Rundhet Scale 10 my mark s Fa y H sek Programed 5 00 M7005 Measuring roundness 1 24 Contends MN seca E E E E E E EAA SHAN rapes out assures be cert en gene ace eee aes eee cera 3 1 1 P E E E EE S E EEA E AE E 4 MP A E E E E E I E E AE A A E T ET 4 DG O E ESE E A E EEE A 5 3 To setup the measurement program ssseesseesseessessssersserssersserssseossesssessersserssersssrosersssersseesserssersseesseeo 7 Be e T E E E E E E EAE TE E E E E E E 10 4 1 IVS GTN DY FOLIU OM oseni AE EEEN SE EEEE EEEE EEEE 10 42 Ordinary Mastri Sessera AE E AE EE EEEE EEE EEEE EEEE 11 3 Tomes a pilsneri a E aI E rE EEEa RAR 12 5 1 Ca EBE IU Seeks vereratecctenatesetmnaranar osama denesesaseoandnataradsancnatar oaaicemaeadtataaanaantcmmutatigensteriancutacacanes 12 SZ Measurement with measurement order H1 the Shaft example osmmsssssssrsssrrsrrrrsrrrsrrrrrrrrerrrerrrrrrrr rr rss 12 5 3 Measurement with the measurement order given by a index pulse the Ring exXample 12 CR 00 eee tent Ree Seen ee rte nee nee Renee eee eee ee ener eee ree re eee ere reece rrr ee 13 6 1 The tolerances are displayed pais satesasecatenetoveljeauacencrnsamsamnasgsetenatoneensstancmeahemaansdaantant amateur ascend 13 6 2 The Tolerances are not displayed aiesisccarssadocatvncsesedendaccaannosasadoaeheced
11. ement values list Matematikf retager jz Roundness List Printed 15 06 30 13 50 15 Name RoundnessRing Batch b1 Matt 1 1 Page 1 UTol 0 050 LTol 0 050 M1 Rundhet M7005 Measuring roundness 23 24 C The difference between a reference sphere of glass centrum and the rotation centrum influence the roundness A sphere of glass with ovality 0 2 my is positioned x y offset of the rotation center The roundness is then measured Test p glassf r orunfhet0 2 my mha CEJ s rundhetsm tare Datum 150612 X 1 y centrum dif 0 18 6 6 11 18 28 O 26 32 42 52 10 00 20 00 orundhet 0 2 1 00 20 59 6 71 6 71 11 05 20 59 30 87 0 00 31 06 40 61 52 20 72 14 30 00 40 00 0 1 0 6 0 2 0 1 0 44 0 65 1 42 0 12 1 3 1 53 2 01 3 04 50 00 orundhet 60 00 0 2 0 3 glassv ren r 0 2 my orund 0 8 0 4 0 38 0 64 0 85 1 62 0 32 1 5 1 73 2 21 3 24 70 00 80 00 Serie1 Results Approximately 4 of the difference between the two centers enters as a part of the roundness M7005 Measuring roundness 24 24
12. is document On no event shall Matematikf retaget jz Sverker Johansson be liable for direct or consequential damages arising from use of this document or by software or hardware described in this document M7005 Measuring roundness 2 24 1 General The program measures the radius of a rotating detail during one lap The result is presented graphically see Figure 1 The underlying measurement values are displayed as a list see Figure 2 Eile Customize Help Name RoundnessRing Mess Rundhet X close M1 Show Rundhet M MeasName JAI Meas v Tolerances Sampling Frequency tt seak Scale 10 my mark Progiamed 5 00 Recewed 8 03 Rotations Speed r min Progiamed 3 00 Recewed 3 21 0 050 The Meas order is given by the Meas onder 12 Results ReMax 0 020 R Mirc 0 000 0 010 0 010 0 020 Centre offset X 0 011 Y 0 020 AsList D Centering Figure 1 Graphic presentation of measurement results File Show Customize Help Name RoundnessRing HW as Nome XClose Roundness ldre M1 Rundhet 0 050 0 050 0 019 0 019 0 019 0 019 0 019 0 019 0 018 0 018 0 017 0 017 0 016 42 0016 13 0 015 14 0 014 1 Select Meas for Copy or Print From 1 To Figure 2 The measurement result as a list Description of the M7005 see the Manual M7005 User manual witch and can be downloaded from M7005 s website M7005
13. just mark a category and drag the Command to the Panel in the Dimension Display To remove an Object just drop it outside its Panel in Dimension Display Rearrange Object by drag and drop Category SCAM Scan Meas Utilities O Show p Roundness measurement bl Tools Repetition Test MSA 6 Applications Status Default Save Modifications Select and drag and drop the button on to the panel M7005 Measuring roundness 20 24 Meas Programs Utilities Show Tools Customize Print Applications H Matematikf retager jz RoundnessRing 15 07 01 10 10 23 M7005 Metem se Batch in Bach Grp Part ID Mode Spe Meas Data Status b1 0 173 Rel i O Sparat And there it is Remove a button With Customize window open you draw the button that you want to remove away from the button panel and drop it outside the panel Save Do not forget to click the Save button in the Customize window M7005 Measuring roundness 21 24 Appendix A Example on protocol Matematkf retagetger iz 15 06 30 13 33 45 Testprotokoll M7005 metem se E E j oss sees sanna Neme RoundnessRing Mess 1 undhet Tol Upper 0 050 Tol Lower 0 0 50 Results R NMiax 0 070 Roundness 0 020 R blean 0 000 R lean 0 000 R Min 0 010 Max Mlin mean square arithmetic Scale 10 ny mark Centre offset X 0 011 Y 0 020 M7005 Measuring roundness 22 24 B Example on a measur
14. metem se Two examples are used throughout this manual M7005 Measuring roundness 3 24 1 1 Ring Index Figure 3 Roundness measurement of a ring We measure a ring that is posted on a table that rotates On the table is an index mark and a sensor 12 that provides a pulse when the index mark is passed By allowing measurement order to be high between two index passages we retrieve readings during a lap The ring must be positioned so that T1 works within its working range throughout the revolution but the ring s center and the rotation center need not coincide The program is able to correct for a minor difference About 4 of the differences between the ring center and the rotation center is added to the ovality Note However the table center must not throw If so the table centrum movement will be included in the measured ovality 1 2 Axel T2 es A Figure 4 Measurement of ovality for one diameter Unlike the ring example we do not have an index pulse to start stop the measuring instead we must let the program based on the rotation speed calculate how long alap takes The program begins to take in readings when we click the run button in the graphic image and continues to the estimated time to rotate one revolution has gone M7005 Measuring roundness 4 24 2 To get started Give the required roundness parameters In the measurement program you must declare the measurement as a roundness measuremen
15. must not get too big when about 4 of the deviation enters in the ovality See Appendix C The measurement starts in the ring example by the index pulse and continues to the next index pulse For the shaft example the measurement starts when you click on run button and continues until the time a lap is expected to take has run out RUN M7005 Measuring roundness 5 24 The result The results are displayed as a graph and the various radius calculated in the Results see Figure 1 The individual measurement values can be seen in the image that is displayed if you click on the button As List see Figure 2 If you like the result may be saved to a txt file You can also retrieve previously saved measurements from txt files Print Protocol amp Print Preview Printer setup Copy to te file Read from bt file See section 7 M7005 Measuring roundness 6 24 3 To setup the measurement program The Shaft example The figure 5 shows the Define Measurement Programs form for the Shaft example File Mastering More add on Edit Plc Program Spc Measure Program common Data Transd Meas triggs digita bit Help Program name RoundnessShaft Register order of dim 3 OK value limit Samplings frequency 5 00 no sek 200 0 72 of tolerance width Roundness Rotation speed Define dimension Mi M M3 D202 d226 pie oo T2 T2 2 Cpy 20 200 H Ca o Figure 5
16. ntax Test run Row 5 How to program M7005 plc function are described in the Manual M7005 Pic programming The manual can be downloaded from M7005 s home page M7005 metem se Note In the usual Display Dimension picture the values are continuous updated as long as measurement order is high When the measurement is completed measurement order goes low the results is calculated and roundness measurements shows the ovality roundness RMax RMin M7005 Measuring roundness 9 24 4 Mastering There are two types of mastering mastering by rotation and ordinary mastering You choose the type by the Mastering by rotation when you put up your measurement programs A measured value the numerical value that the measurement formula gives zero difference Where Zero difference The measured deviation from nominal value the numerical value that the measurement formula gives at the time of the mastering Note If you are only interested in the parts form and its roundness RMax RMin no mastering is needed 4 1 Mastering by rotation Mastering is done by rotating the master ring During the revolution all values are collected and forms the mean value The mean value is used as the value given by the measurement formula when the zero difference is calculated The mastering is like a normal measurement e Center the master ring e Click on the mastering button The sign below appears Put Mas
17. oedaaseescdterasaansenaiarvtadsiensdeveieaiamoanss 14 6 3 Showthie resul AS ANIC 5a a2 acanacaeaseae donetaasanndelasaignscenasencsanaronisence NER RASERNA 15 OA WCAG AY a inte tons atatntrinee estate nevatinvatas ate EEE 16 6 5 Print of test protocol and measurement Values liSt m sseosseossrrssrrrsrrrserrerrrrrrrrrrrrrrrrrrrrrrrrrrrr rer rr ers s rr rss 16 T COPY vaes WO TO E t pect etree EE NNE sedate 17 amp F TO CeMIC RA POL acetate nih cenbedate arate ae te cetera teak sia Geve E E 18 2 CUStOmiZe colors and TOMS s cac tannvsenceoneahadenaatacuasencousmetoncasancnsiadnoasnnend ad a 19 10 To add The Roundness Button to the M7005 s button Panel ssssssssrrsssrrssrrrrrsrrrrrrrrsrrrrrrrrrrrrrerrrrrrrr rr 20 PUD De MK sc aries csuniodandncetees E E O E EEE AET EAE E EARE 22 A Example on Pl OLOC Ol veuncsasatesconoacemitaadaunoateusiacti on amuinateacatataion SATSER NANNA REAR edda 22 B Example on a measurement values list sssmmsssresssrrssrrrsrrerrerrrerrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr rer ser srrr sr ers r ers sr rss rr nns 23 C The difference between a reference sphere of glass centrum and the rotation centrum influence the PO 010 CHIN e EAE AE A A T E E cused KEANE NA A A A AA 24 The information in this document is subject to changes without notice and should not be construed as a commitment by Matematikf retaget jz Sverker Johansson Matematikf retaget jz assumes no responsibility for any errors that may appear in th
18. otation speed not shown for measurement programs with measurement order H1 Programmed It is specified in the programming of the measurement program Received 1 the time between the two index pulses that started and ended the test Tolerances they are given at programming of the measurement program The Result When the measurement is completed the program recalculates the values with consideration of the difference between the part center and the center of rotation the coordinate system is moved the distance specified by the Center offset R Max largest measured radius R Min smallest measured radius R Mean least squares radius calculated by least squares R Mean arithmetic The radius as the arithmetic average of all values Roundness ovality R Max R Min the difference between the maximum and minimum radius 6 2 The Tolerances are not displayed If the tolerances not to be shown the program use the entire area to display the graph The resolution will now be 5 my instead of 10 my in figure 10 tome RoundnessRing me Rundhet Figure 11 Roundness measurement tolerances not shown M7005 Measuring roundness 14 24 6 3 Show the result as a list AsList Click on and the window in figure 12 is shown File Show Customize Help Name RoundnessRing ee XClose Roundness i Tolerances Sh A uToi 0 050 LTol 0 050 0 019 0 019 0 019 0 019 0 019 0 019 0 018 0 018 0 017 0 016 0 01
19. t You must also specify the rotation rate sample rate and if the measurement program shall be mastered by rotation See section 3 To setup the measurement program To show the roundness measurement form The image in Figure 1 is displayed by M7005 s drop down menu Applications Roundness measurement The picture has its own button that you can put out on the M7005 s button panel by Tools Adjust Status and Button Panel If you only are interested in the ovality i e the difference between the maximum and minimum radius there is no need for mastering and there no use of tolerances On the other hand if you like to know the measurements absolute value you must as always do a mastering Mastering can be done in two ways either by having a reference ring rotate one revolution mastering by rotation or by putting a master between the center of rotation and the transducer regular mastering Mastering More information in part 4 Mastering Measuring Place the part in the measuring position For the ring example the ring has to be centered In order to make it easier there is a window Help to center a part see section 8 The radius in the shaft example is measured by two opposite transducers and in this case there is no need for centering Note The centering does not have to be absolute since the program compensates for differences between the tables rotation center and the center of the part However this discrepancy
20. ter Mast yy in position e Click OK e The sign in figure 8 pops up e lf H1 is measurement order i e a measurement program like the shaft example clicking on the Start button and the mastering proceeds one revolution e f we have a measuring program type ring example the mastering is started by an index pulse and continues to the next index pulse e When mastering has proceed a full turn you click the Return button and the mastering window disappears and the sign below pops up Mastering finished M7005 Measuring roundness 10 24 Mastring is started by the Meas order I2 Figure 8 Mastering by rotation 4 2 Ordinary Mastering If not Mastering by rotation is selected Mastering is done in the usual way e Place the master between center of rotation and the transducer e Click on mastering icon on the button panel The sign below appears Put Master Mast yy in position e Click OM OK e After afew seconds the sign below pops up and mastering is complete Mastering finished M7005 Measuring roundness 11 24 5 To measure a part The requirement for making a roundness measure is that the Roundness Graph figure 10 is the top most window The picture comes up by M7005 s drop down menu Applications Roundness measurement While measurement is in progress the measurement order is high and the window in figure 9 is displayed When the measurement is finished measurement order goes low
21. ues can be printed from the Roundness List image You can in the Select Meas for Copy or Print choose which values to be printed See figure 14 below Example are in Appendix B M7005 Measuring roundness 16 24 7 Copy values to from txt fil File Customize Help Print Protocol Print Preview D bt Ws Printer setup Copy to txt file Read from bt file ev You can copy to from a text file both from the graphic image and the image displaying the values as a list File Show Customize Help Page Header s N ho J Selection for Copy Print v AR Name 2 Cloeo Show options V Tolerances M1 Rundhet A 0 050 0 050 0 019 0 019 0 019 0 019 0 019 0 019 0 018 0 018 0 017 npgongggg p Select Meas for Copy or Print From 1 To 150 Figure 14 The measurement values You have to mark Selection for Copy Print in the List images figure 14 drop down menu Show other wise the Select Meas for Copy and print panel is hidden Sets the From and To inputs to start end values to be printed copied You can also select values by dragging with the left mouse button down in the column Change Delete values If you right click on the number for a specific value the image below will pops up You can change remove values on the line Are the changes OK they are saved when you click Save M7005 Measuring roundness 17 24 8

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