[Do...] Posted December 23, 2021 Share Posted December 23, 2021 I seem to be confused on how surface profile is calculated in Calypso. I know that you find the largest deviation OUTSIDE workpiece (Max). Then find the largest deviation INSIDE workpiece (Min). Once that is done A = largest ABSOLUTE value of either Max, or Min. Then the reported actual profile deviation = 2xA. In the images below "Plane2" has a Max of 0.0005". If I plug this into the equation 2xA, the actual profile deviation of Plane2 should be 0.001". When I program the profile characteristic for Plane2, I am getting a profile reading of 0.0254". My FCF reads: surface profile of 0.020 to datum -A-. I have provided a rudimentary sketch of the feature and its orientation according to the WCS as well as the feature related info. What am I missing or doing wrong?Screenshot 2021-12-23 152558.jpgInkedCapture3_LI.jpgInkedCapture4_LI.jpg Link to comment Share on other sites More sharing options...
[Is...] Posted December 24, 2021 Share Posted December 24, 2021 The Min / Max values in the feature come from the coordinates of the feature itself (similar to flatness), then it doesn't consider the Datum A or whatever is your Alignment.. Link to comment Share on other sites More sharing options...
[SH...] Posted December 25, 2021 Share Posted December 25, 2021 Create a secondary alignment using datum A, then check your feature under that alignment. Link to comment Share on other sites More sharing options...
[Er...] Posted December 27, 2021 Share Posted December 27, 2021 Remember Profile covers form, size, as well as location. Because the 1.650 actual measures 1.6617" and is .0117" from nominal, your results will at least be double, or .0234" If you add the other .0016" from the difference of form error doubled, you are close to the value calypso measures at .0254." It seems to me this calculation is correct. Link to comment Share on other sites More sharing options...
[Do...] Posted December 28, 2021 Author Share Posted December 28, 2021 Thank you Eric. This helped a lot. I assumed this to be the case, but I wanted another opinion to confirm. Link to comment Share on other sites More sharing options...
[To...] Posted January 4, 2022 Share Posted January 4, 2022 Please sign in to view this quote. Plus the deviation from the projection angles. Link to comment Share on other sites More sharing options...
[Ri...] Posted January 4, 2022 Share Posted January 4, 2022 Oh I love Profile. Mr. Machinist can you press the "adjust Profile" button for me? Link to comment Share on other sites More sharing options...
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