[Cl...] Posted October 20, 2020 Share Posted October 20, 2020 The part is a cannulated cylinder about 8" long, on the left side is a slightly larger OD cylinder that is made up from two 100 degree radial segments 180 degrees apart, (not a full circle) separated by two flats 180 degrees apart. Datum-A- is an ID only about 2" long on the right end of the part. I'm reporting the position (.007 -A-) of the larger OD back to -A-. The segmented OD is going to be a problem, and datum -A- is just to short. They say they can't straighten the part less than .005". I'm just looking for ideas to I'm prove my results. Thanks in advance. Link to comment Share on other sites More sharing options...
[Ma...] Posted October 20, 2020 Share Posted October 20, 2020 You want to improve your results by strategy? Or you want to prove your strategy? 😃 Anyway, separated circle ( cylinder ) : choose slower scanning speed or use touch points instead. Slower speed gets less masked points. MMC for datum A would be nice 🙂 If it's bore than it can be difficult for concentricity. I don't know usage, but couldn't you use circle on left side? I dont' believe that is left side without support. Link to comment Share on other sites More sharing options...
[Ch...] Posted October 20, 2020 Share Posted October 20, 2020 If you use concentricity, then you will have difficulty with projection error on this type of measurement. They cover exactly what you're trying to do about 2/3's way down this pdf.Profile_Concentricity_CALYPSO.pdf Link to comment Share on other sites More sharing options...
[Cl...] Posted October 20, 2020 Author Share Posted October 20, 2020 Exactly what I was looking for Chad, thanks! Link to comment Share on other sites More sharing options...
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