[Lo...] Posted January 13, 2021 Share Posted January 13, 2021 I have a print with with 3 planar datum targets. 2 are coplanar and parallel, but the 3rd is not coplanar or parallel to the others. How would I achieve this in Calypso. I dont know if its a valid callout or not. The engineer used the 3 pads where the part mounts against its mating component. I'm curious on if anyone else here as seen this? Link to comment https://qualityforum.zeiss.com/topic/13728-non-coplanar-datum-targets/ Share on other sites More sharing options...
[Cl...] Posted January 13, 2021 Share Posted January 13, 2021 Can you attach a picture, or drawing? Link to comment https://qualityforum.zeiss.com/topic/13728-non-coplanar-datum-targets/#findComment-70642 Share on other sites More sharing options...
[Ke...] Posted January 13, 2021 Share Posted January 13, 2021 Please sign in to view this quote. How tightly are the datum planes controlled to each other? The first thing I would probably want to do is verify that the 2 datum targets are flat & parallel to each other, within acceptable parameters, and then verify the angle/location of the 3rd, relative to those two. Link to comment https://qualityforum.zeiss.com/topic/13728-non-coplanar-datum-targets/#findComment-70644 Share on other sites More sharing options...
[Ri...] Posted January 13, 2021 Share Posted January 13, 2021 First step - measure them as individual points Second step - go to Features - Special Geometry - Select Offset Plane Third step - Recall the (3) individual points Fourth step - go to Evaluation - Point Modification Edit - correctly offset the point or points that need offset to make them all coplanar. The Offset Plane can be buggy at times, so I find that I need to make my offset, close the feature, and open it again to check. I would strongly suggest to not use this in the Base Alignment if you don't have to, but I've used it in the Base Alignment in cases where I just had to with no issues (the only issue I ran into was when I needed to correct the nominals of the offset, and do Subsequent Evaluation it has no impact since it was part of the Base Alignment). Link to comment https://qualityforum.zeiss.com/topic/13728-non-coplanar-datum-targets/#findComment-70646 Share on other sites More sharing options...
[Lo...] Posted January 13, 2021 Author Share Posted January 13, 2021 Planar features so points are not an option. They are 22mm diameters. A3 is a plane that's 15 degrees tilted and about 29.7mm different in Z from A1 & A2.A3.jpgA1-A2-A3.jpg Link to comment https://qualityforum.zeiss.com/topic/13728-non-coplanar-datum-targets/#findComment-70648 Share on other sites More sharing options...
[Ri...] Posted January 13, 2021 Share Posted January 13, 2021 You can still do what I suggested, but with a little extra work. Measure them as Planes, and then create a Point that recalls the center for each Plane. Link to comment https://qualityforum.zeiss.com/topic/13728-non-coplanar-datum-targets/#findComment-70650 Share on other sites More sharing options...
[Da...] Posted January 13, 2021 Share Posted January 13, 2021 I would suggest checking them as planes using outer tangential and getting the high point from each pad and use those as the points for Richards step by step method. Link to comment https://qualityforum.zeiss.com/topic/13728-non-coplanar-datum-targets/#findComment-70652 Share on other sites More sharing options...
[SH...] Posted January 13, 2021 Share Posted January 13, 2021 Please sign in to view this quote. I just work out it now, when I opened the feature it working as you mentioned. My doubt is that what is the use of filters and outliers for this feature, only three points!!!! Link to comment https://qualityforum.zeiss.com/topic/13728-non-coplanar-datum-targets/#findComment-70654 Share on other sites More sharing options...
[Ri...] Posted January 13, 2021 Share Posted January 13, 2021 Most Datum Target Points follow a 3-2-1 method, so that shouldn't be an issue. Link to comment https://qualityforum.zeiss.com/topic/13728-non-coplanar-datum-targets/#findComment-70656 Share on other sites More sharing options...
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