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.
.0006 and some change. I was told not to change any of limits. I wasn't sure if a silicon nitride tip should have different limits. I've also reached out the Renishaw to see if they have any info on my this tip is failing calibration.
if that is inches, then it will only get worse. Of course, is this for SIZE or for STDDEV value? If for size, then it is probably too low, unless it is for a scanning head. For over 30 years, every probe, no matter the size, no matter the machine, for a TTP, the size has been 0.025mm small on average, but the STDDEV has been less than 0.005mm. TTP will always show small, and a 27mm long shank is going to flex a lot, and make the size even smaller, but the STDDEV should still maintain.
Some vendors define distance from the probe shoulder to the ruby differently. Unfortunately Hexagon shrank its probe inventory so bad our QC team had to source probes elsewhere with predictable issues regarding probe lengths. We have probes from Hexagon, itp, Q-Mark & Renishaw!
Another issue is what kind of probe module you have. Is it a scanning or touch probe? Because I ran into a problem where I would attach 1mmx20mm Renishaw probe to the Renishaw extended force module & it would not pass calibration standard deviation. By attaching it to the low force module it passed standard deviation with no difficulty.
Yet another issue might be calibration touchspeeds. For probes less than 2mm in diameter we set the touchspeed at 1% (we work with percentages).