[Ty...] Posted October 18, 2024 Share Posted October 18, 2024 What is L2 Evaluation. I'm Guessing it is Just LSQ and you constrain the Vector?Geo-Tol.jpg Link to comment https://qualityforum.zeiss.com/topic/4562-rocking-datum-and-constrained-l2-algorithim/ Share on other sites More sharing options...
[Ri...] Posted October 21, 2024 Share Posted October 21, 2024 No. The L2 would be the Gaussian Shift Outside. "However, L2 will create a plane in the middle of these points (therefore internal to the material) and is not the functional datum plane the part will contact in the assembly. Therefore, a constraint is added to the algorithm: to always make the plane external to the material. A constrained L2 is a minimization algorithm that maintains high point contact." Link to comment https://qualityforum.zeiss.com/topic/4562-rocking-datum-and-constrained-l2-algorithim/#findComment-13962 Share on other sites More sharing options...
[To...] Posted October 23, 2024 Share Posted October 23, 2024 Please sign in to view this quote. Can you describe the settings in Calypso to satisfy this condition? And, should this become the default setting for all datum planes? Link to comment https://qualityforum.zeiss.com/topic/4562-rocking-datum-and-constrained-l2-algorithim/#findComment-13964 Share on other sites More sharing options...
[Ty...] Posted October 23, 2024 Author Share Posted October 23, 2024 so inside calypso, what is the correct way to Build this.. Constrain my datum to its normal Vector and Leave evaluation AT LSQ? Link to comment https://qualityforum.zeiss.com/topic/4562-rocking-datum-and-constrained-l2-algorithim/#findComment-13966 Share on other sites More sharing options...
[Ri...] Posted October 24, 2024 Share Posted October 24, 2024 Please sign in to view this quote. I believe at the moment, unless you performed an offset plane yourself, the new GD&T package is the only way to achieve this. Link to comment https://qualityforum.zeiss.com/topic/4562-rocking-datum-and-constrained-l2-algorithim/#findComment-13968 Share on other sites More sharing options...
[Ri...] Posted October 24, 2024 Share Posted October 24, 2024 Please sign in to view this quote. Don't read so much into the "constrained" portion. It is just the LSQ built plane, but shifted to sit on the outside of the material. Link to comment https://qualityforum.zeiss.com/topic/4562-rocking-datum-and-constrained-l2-algorithim/#findComment-13970 Share on other sites More sharing options...
[Je...] Posted October 24, 2024 Share Posted October 24, 2024 Please sign in to view this quote. Measure the plane as LSQ, make a secondary alignment and set rotation in space on it, copy the plane, in the copy you set alignment on your secondary alignment, recall points from the measured plane, go to evaluation, constrain normal vector and set the method to otf Link to comment https://qualityforum.zeiss.com/topic/4562-rocking-datum-and-constrained-l2-algorithim/#findComment-13972 Share on other sites More sharing options...
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