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6mm probe not measuring correctly

I was having trouble getting diameters to come out correct so I calibrated my probe with a certified sphere. I followed the procedure to the point. It was measuring as much as 1.5mm small, after a few calibrations, I am now measuring .4mm big. My std dev was at .016 and max error at .033. My 15mm and 3mm measure fine, length and point checkout also were fine. I have an Infinite 2.0 with 2012 mr1. Any suggestions?
  • I have never used one but have heard that they are hard to calibrate. People use them to check inside tooling cuts, scribe lines, all sorts of things.


    The only ones I've ever had were carbide "pointers", but they aren't actually a sharp point, but a 0.25mm diameter probe. Hard to calibrate? Not any harder than a disk probe. HOWEVER, you slow way down to calibrate them so you don't (1) chip the probe and (2) put a ding in the cal-tool.
  • ...there's actually a 'plane calibration' in which you calibrate the point probe off a flat, calibrated surface.
  • The only ones I've ever had were carbide "pointers", but they aren't actually a sharp point, but a 0.25mm diameter probe. Hard to calibrate? Not any harder than a disk probe. HOWEVER, you slow way down to calibrate them so you don't (1) chip the probe and (2) put a ding in the cal-tool.


    Never calibrated a disk probe, but I have heard for alot of past/current arm users that they didnt prefer them since the calibration was a pita. I do see a place for them just never used one.