We have recently started to replace our ruby tip probes with silicon nitride tips. However, we haven't been able to use any of them because we keep getting the "probe calibration exceed limit" error. All of our ruby tips calibrate fine. Has anyone else ran into this issue? Any trouble shooting ideas? I've done everything I can think of.
We don't have the ability to change to a low force module. We are working with an HH-MI so the tips just twist in. I changed the touch speed from 2 to .5 and it still failed. its possible that the distance from shoulder to tp is defined differently. still waiting to hear back from Reinshaw.
it will correct the length after the first calibration, even if it fails. The length might not be perfect in the results (yet), but a 3rd calibration will correct for any length different less than 2x the ball size.
SO, STDDEV tol is set to 0.0003937" and the size tol is set to 0.0006". Is this correct? And you are using a TTP (touch trigger probe)? 0.0006" is too small for the size tolerances. IMO the STDDEV is too high. STDDEV of 0.0002" is plenty big (half of what you are using). AND, the size tol is way too small. The calibrated SIZE will always be small on a TTP. For that 1mm ball on a 27mm long probe, you are going to be 'REALLY' small due to the flex of the shank. I would expect to see it small by 0.010" or so. The STDDEV is the critical result. You need to calibrate then check a known 'standard' (ring gage, micrometer standard, etc.) and see what your results are.
It ended up being a corrupt probe file. Our CMM just stopped one day. we have an old Sheffield controller/ jog box and we thought the controller was just dead. so we ordered a new one with the same result. PQI ended up finding the problem and we had to delete every probe file. Didn't find out it was this specific probe until I went to make the file and the same thing happened.
