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"SP600" probe measures too small

Henniger123
Good day,

I have a problem with the "SP600" probe head.
The diameters are, regardless of whether they are scanned or with an auto-element circle, it is always exactly 0.010mm smaller than it should.

Tested on a purchased ring with a certificate

Calibration says 1my standard deviation.

Maintenance says everything is ok.

Temperature compensation is off, but the room temperature is 20.5 ° C

Is it possible that the calibration is set incorrectly?
or is it a hardware error?

what can i do differently?


Useing pcDMIS 2020R1


Thank you for your time

Parents
  • Good day,

    Thank you very much for your feedback

    I'm not sure about the diameter of the "cal-sphere", but the certificate for this should still be around somewhere. Afterwards dig a bit.

    "lower matrix" hasn't been done for a while, so that could also be the problem. (why does that influence the measured diameter? just curious)

    So what do I have to consider with "lower matrix" or simply press the button with the reference probe?

    Thank you for your time.
  • in reply to Henniger123
    clean the tip and the sphere
    select the L50D8 (length 50 mm - diameter 8 mm : it's the "standard tip" for the SP600)
    select "reset to theo", and "yes, the sphere moved"
    calibrate by selecting "lower matrix", then re calibrate.

    I'm not sure that it will change lot the diameter, maybe more the circularity.

    For the sphere, you should look to the stem, the diameter is often write on it.

    Hope this helps.
Reply
  • in reply to Henniger123
    clean the tip and the sphere
    select the L50D8 (length 50 mm - diameter 8 mm : it's the "standard tip" for the SP600)
    select "reset to theo", and "yes, the sphere moved"
    calibrate by selecting "lower matrix", then re calibrate.

    I'm not sure that it will change lot the diameter, maybe more the circularity.

    For the sphere, you should look to the stem, the diameter is often write on it.

    Hope this helps.
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