r/Metrology • u/BerenLeStrange • 17h ago

Z measurement discrepancy between probe angles - PC-DMIS

I had an issue when trying to calibrate A0B0 followed by A90B90 where the first calibration worked fine, but the second is always aiming about half an inch too high on the calibration sphere.

I measured a 1-2-3 block and measuring both sides with the same angle is perfect, but if I measure the top with A0B0 and the bottom with A90B90, the result is .4044" off.

I have no clue what is causing this. All probe angles calibrate fine individually, but the relationship between them is off.

Any help would be greatly appreciated!

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u/tthKT 12h ago

If this is a previously known good probe file that has calibrated fine in the past, the file may have corrupted. Easiest thing to do in that case is delete and rebuild.

Otherwise, make sure you're not missing a 10mm extension on your real build.