I have a simple one for you which may have some complex answers. As a rule of thumb I have always avoided using any kind of focus points/positions to do any kind of Z location/height measurements.
Do any of you use focus points with high confidence? I have had decent experiences and sometimes I have had complete failures with it. Is it safe to assume it comes down to material and lighting and the application? I found that when trying to perform this on a very centralized locations within your FOV it then becomes very difficult to make repeatable.
I made some tests, comparing touch probe and CMMV. The focus can be repeatable less than 0.01 mm with a fixed light... If you change the light, the focus position can change more than some 0.01... and be repeatable at this position !!!!!
I made some tests, comparing touch probe and CMMV. The focus can be repeatable less than 0.01 mm with a fixed light... If you change the light, the focus position can change more than some 0.01... and be repeatable at this position !!!!!