[Ca...] Posted May 1 Share Posted May 1 I need to measure a circular groove. I need to determine the groove width and center circle diameter. What's the best way to determine the center circle diameter from the inner and outer diameters? The groove is for a seal. Is there such a thing as a circle of symmetry? Link to comment Share on other sites More sharing options...
[Cl...] Posted May 1 Share Posted May 1 Sounds like an oval? If you have a model you should be able to extract a nominal circle segment from it. Open that circle feature. Copy/paste the extracted segment. Set it 180° from the first. Add points. Highlight both segments, tick "Group Circle Paths". Probe single points and constrain work-plane coordinates. With curve, scan around the entire surface. Recall the points into a nominal circle and set the evaluation to Maximum Inscribed Element" Link to comment Share on other sites More sharing options...
[Ma...] Posted May 1 Share Posted May 1 That groove is like torus or cylinder? Link to comment Share on other sites More sharing options...
[Ma...] Posted May 1 Share Posted May 1 Is the groove on a flat face, like for a face sealing O-ring? If so, you should be able to measure the inside and outside diameters of the groove and calculate the mean of the two diameters. You could probably also achieve a good representation of your "circle of symmetry" by recalling all of the feature points for both circles into a single circle with LSQ evaluation. Form deviation will be high, obviously, but the location and diameter output should be correct. Link to comment Share on other sites More sharing options...
[Lu...] Posted May 1 Share Posted May 1 Please sign in to view this quote. Would you need to make sure that both circles have the same amount of points in order to make sure the middle circle doesn't lean to the inner/outer circle? Or would that not matter Link to comment Share on other sites More sharing options...
[Ca...] Posted May 1 Author Share Posted May 1 Please sign in to view this quote. Like a cylinder, but only 0.2mm deep. So I only measure the top edge with the camera. This results in two circles. One for the inner diameter and one for the outer diameter. Link to comment Share on other sites More sharing options...
[Cl...] Posted May 1 Share Posted May 1 Is this similar to what you have? Link to comment Share on other sites More sharing options...
[To...] Posted May 1 Share Posted May 1 Use Result Element with a formula to subtract the radius of the smaller circle from the radius of the larger circle. Link to comment Share on other sites More sharing options...
[Ca...] Posted May 1 Author Share Posted May 1 Please sign in to view this quote. Well, I had that idea too. However, I was hoping Calypso would provide a ready-made function for that. 1 Link to comment Share on other sites More sharing options...
[Ma...] Posted May 1 Share Posted May 1 (edited) Wouldn't caliper distance do that? setting with min-min or min-max - i am not sure, but this should work. And inverting that ( min-max / max-min ) should report max and min distance. Otherwise should work intersections, right? Or am I missing something? Edited May 1 Link to comment Share on other sites More sharing options...
[Ca...] Posted May 2 Author Share Posted May 2 Please sign in to view this quote. Für den Nutabstand ist der Messschieber Abstand ok. Aber die Mitte Nut ist damit nicht zu ermitteln. Dann bleibe ich dabei die beiden Kreise zu subtrahieren Link to comment Share on other sites More sharing options...
[Ma...] Posted May 3 Share Posted May 3 Please sign in to view this quote. For that you can use mid or symmetry from circles. Nothing else is comming to my mind. Link to comment Share on other sites More sharing options...
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