[Ja...] Posted April 14, 2023 Share Posted April 14, 2023 Is there a setting I'm missing or adjustment I need to make to resolve my issue? Not the first time, but after verifying in the lathe that all seems to be well in print, in previous cases, this one included, my Zeiss findings vary from say a dial indicator... And, I've even doubled checked the flatness of the bottom of part to ensure it is flat on table... LSQ Feature is being used... Sweeping Pattern is being used... .600 speed / 500 points... Any help/guidance is much appreciated... Thank you!ARTHUR 1.PNGARTHUR.PNG Link to comment Share on other sites More sharing options...
[Da...] Posted April 14, 2023 Share Posted April 14, 2023 How are you aligning? Link to comment Share on other sites More sharing options...
[Ja...] Posted April 14, 2023 Author Share Posted April 14, 2023 Please sign in to view this quote. Thank you for replying... Alignment attached... PLANE 1... top face of sleeve (above the labeled ID...) CIRCLE 1... is the labeled OD diameterARTHUR 2.PNG Link to comment Share on other sites More sharing options...
[DW...] Posted April 14, 2023 Share Posted April 14, 2023 In your OD to Bearing OD runout evaluation, is the OD a circle and the Bearing OD a cylinder? Link to comment Share on other sites More sharing options...
[Da...] Posted April 14, 2023 Share Posted April 14, 2023 How long is the ID Link to comment Share on other sites More sharing options...
[Ja...] Posted April 14, 2023 Author Share Posted April 14, 2023 Please sign in to view this quote. All three diameters are measured as one level/standard CIRCLES... Link to comment Share on other sites More sharing options...
[Ja...] Posted April 14, 2023 Author Share Posted April 14, 2023 Please sign in to view this quote. That is definitely one reason for ERROR I have found... an ID/OD both with a matching depth of say 1.250, versus an ID of .750 and an OD of 1.500, as in this case... Link to comment Share on other sites More sharing options...
[Er...] Posted April 17, 2023 Share Posted April 17, 2023 I would use the bearing OD measured as a cylinder for spatial alignment. This could be done with a secondary alignment. Then measure the circles. I would keep the old features and characteristics the same for comparison. Link to comment Share on other sites More sharing options...
[Ja...] Posted April 19, 2023 Author Share Posted April 19, 2023 Please sign in to view this quote. Thank you for the reply... Similar to the report/picture above, this is 90% of what we measure here, OD (coating) to ID (merely to check the RunOut)... CIRCLE almost always being used for each... The HEIGHT difference between the two circles I'm finding is more or less the culprit of my issue/question... So pretty much at this point, when I measure out of print, usually .002 tolerance, I manually verify in lathe and find otherwise... Link to comment Share on other sites More sharing options...
[Er...] Posted April 19, 2023 Share Posted April 19, 2023 The plane is not going to be perfectly perpindicular to the OD. So the further apart the circles are the more the perpindicularity would effect the runout. Do you have the same issue with the diameter from the CMM not matching micrometers? Using a cylinder may help with that too. Link to comment Share on other sites More sharing options...
[Ja...] Posted April 19, 2023 Author Share Posted April 19, 2023 Please sign in to view this quote. Agree, that's why I started going to the lathe and checking myself, removing the face from the possible error... CYLINDER seems to be the desired method to maybe answer my initial question/problem... The next part I come across I with the same error, I will test the theory... As far as Diameter from CMM vs Micrometer, it's pretty similar... Believe me, I inspect work from 9 other people, if the CMM was off I'd definitely be hearing about it... Link to comment Share on other sites More sharing options...
[Ja...] Posted April 24, 2023 Author Share Posted April 24, 2023 ....ARTHUR123.PNG Link to comment Share on other sites More sharing options...
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