I have one that is leaving me stymied. I have an o-ring groove that needs the TSC diameter measured on it. I construct a plane at the bottom of the groove from 4 points and 4 3D lines of 3 points each on the side walls at 90° from each other. Then I pierce the plane with the lines and use those points to construct the circle. No problem really. Today I had an out of tolerance part during a source inspection which means I need to run a 100% sort for that dimension. I took the original program, saved a copy and deleted out anything not involved in the setup or measurement of the circle and ran the same part. I did not touch the part other than with the stylus and I got .0033" smaller diameter (which is in tolerance). I figured I deleted out some necessary code, so I reran the full program stopping it after the setup and jumping to the circle section and got a third value in between the two!!!
I've tried to account for every variable I can think of, but I should not have this much of a delta.
B&S One 7-7-5
PC-DMIS CAD 3.7 MR3
TP20
same probe
no re-cal in between
no crash
same speed
same code
same part
clamped in Rayco the whole time
climate controlled lab ± 3°
probe not loose
Have any of you run into something similar? My boss told me to ask my friends, so I came to y'all (can't shake that from AL).
TIA
Jaime

B&S One 7-7-5
PC-DMIS CAD 3.7 MR3
TP20
same probe
no re-cal in between
no crash
same speed
same code
same part
clamped in Rayco the whole time
climate controlled lab ± 3°
probe not loose
Have any of you run into something similar? My boss told me to ask my friends, so I came to y'all (can't shake that from AL).
TIA
Jaime
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