[sh...] Posted October 15, 2019 Share Posted October 15, 2019 Good Morning, Recently I was asked a question as to why the CMM printout shows 4 Radii being checked as being exactly .135 r without any deviation throughout a significant period of the run. Actually all of the run. + An endmill is interpolating this feature, I sincerly doubt this feature is being checked perfect 100% all the time. Any ideas as to how to double check this? We've used point and scans to check the radius and called out the Ø (.270) All are perfect?!!??!? Link to comment https://qualityforum.zeiss.com/topic/17470-not-updating-realistic-nominal-size/ Share on other sites More sharing options...
[Ia...] Posted October 15, 2019 Share Posted October 15, 2019 Do you have constraints on those radii features? Have you tried taking single points without having the CAD feature selected? (Manually creating a new feature?) Link to comment https://qualityforum.zeiss.com/topic/17470-not-updating-realistic-nominal-size/#findComment-97914 Share on other sites More sharing options...
[sh...] Posted October 16, 2019 Author Share Posted October 16, 2019 We're taking single points and scanning. We also had the y constraint on and off but we keep seeing our .135 R reporting @ .135. Also this program is not using a CAD model Link to comment https://qualityforum.zeiss.com/topic/17470-not-updating-realistic-nominal-size/#findComment-97916 Share on other sites More sharing options...
[Jo...] Posted October 16, 2019 Share Posted October 16, 2019 Please sign in to view this quote. To further clarify this question.. It is possible to have constraints at the FEATURE and/or CHARACTERISTIC level. It is also possible to be rounding at 3 decimal places.. Link to comment https://qualityforum.zeiss.com/topic/17470-not-updating-realistic-nominal-size/#findComment-97918 Share on other sites More sharing options...
[Ia...] Posted October 16, 2019 Share Posted October 16, 2019 Please sign in to view this quote. This seems like the most likely culprit to me. Link to comment https://qualityforum.zeiss.com/topic/17470-not-updating-realistic-nominal-size/#findComment-97920 Share on other sites More sharing options...
[sh...] Posted October 16, 2019 Author Share Posted October 16, 2019 Apparently my co-worker found that the actual s weren't being reported when the Radius box was checked. Any anyone tell me What is the purpose of this Radius box? Link to comment https://qualityforum.zeiss.com/topic/17470-not-updating-realistic-nominal-size/#findComment-97922 Share on other sites More sharing options...
[Ia...] Posted October 16, 2019 Share Posted October 16, 2019 Please sign in to view this quote. That is a size constraint. The purpose is to more accurately read location values, by constraining the size to nominal. If you only care about the size, you could constrain the x,y, and/or z. Link to comment https://qualityforum.zeiss.com/topic/17470-not-updating-realistic-nominal-size/#findComment-97924 Share on other sites More sharing options...
[sh...] Posted October 16, 2019 Author Share Posted October 16, 2019 After this was changed, now the true position call outs associated with these radii are now out? !?!?!?!?!?! Link to comment https://qualityforum.zeiss.com/topic/17470-not-updating-realistic-nominal-size/#findComment-97926 Share on other sites More sharing options...
[sh...] Posted October 17, 2019 Author Share Posted October 17, 2019 Please sign in to view this quote. Ok so to read true position in the best possible manner considering its a small radius, the R box should be checked. Also if this feature is in my XZ i should constrain in Y. In my mind constraining would keep my probe readings in the XZ "plane" without deviation in the Y axis to calculate a more stable reading? Link to comment https://qualityforum.zeiss.com/topic/17470-not-updating-realistic-nominal-size/#findComment-97928 Share on other sites More sharing options...
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