[Bo...] Posted October 3, 2020 Share Posted October 3, 2020 Hi guys, I am measuring a piston skirt diameter. Since the skirt trace is an oval, I am using minimum circumscribed circle to fit the trace and get my ODs. Am I doing it right? Appreciated your help! Thanks! Bob Link to comment Share on other sites More sharing options...
[SH...] Posted October 4, 2020 Share Posted October 4, 2020 What is the design geometry of your skirt?. Link to comment Share on other sites More sharing options...
[Br...] Posted October 4, 2020 Share Posted October 4, 2020 Bob, Have you tried using the Ellipse Feature (under Special Geometries)? I use them for both the base alignment as well as reporting the ovality. You should have a table of some kind giving the ovality (see attached) to tolerance the "D" and "D2" Diameters in the Calypso feature. In my case, the difference in diameters 90 degrees from each other, is .09/ to 0.1mm at different heights.Ellipse.JPGOvality.JPG Link to comment Share on other sites More sharing options...
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