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O.D.'s Measure Small, I.D.'s Measure Large ?

pjleitner
Does anyone know why when using a Romer PCMM, the measurements for outer diameters measure small, while the inner diameters measure large?

I was told from Romer tech support that it is the deflection of the probe. I find it hard to believe that the probe is deflecting .010 when using the 6mm probe and a soft touch.

I'm getting the same results with both or our Romer arms, and with either the 3mm or 6mm probes. I also get the same results when using our PowerInspect software. Both arms have been calibrated recently.

Any thoughts or is anyone else experiencing the same issue?
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  • Good point Bob, measuring Rings would also give the operators instant feed back on their techniques also, sort of a training tool.

    We almost aways have a ring on our manual CMM for the operators to check the probe calibration with, If I can't get it within .0002 its time for a new tip.
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  • Good point Bob, measuring Rings would also give the operators instant feed back on their techniques also, sort of a training tool.

    We almost aways have a ring on our manual CMM for the operators to check the probe calibration with, If I can't get it within .0002 its time for a new tip.
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