I have been checking this part in a custom machined vacuum fixture with no issues. We recently started having issues with this height dimension that is from the fixture to the part. The CMM will read that the height is out by 0.003". So when I realign the the fixture and run the same part the height changes to 0.0003" from nominal. We run a few more parts and then again, the height is back out of tolerance. I'll go realign to the fixture and parts come out nominal again.
They only change is that recently we started checking another part with a completely different probe on the same CMM. They noticed that after running that part, it messes up my first part and I have to realign the fixture again.
Using touch trigger probes.
Any ideas?
