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Probe Calibration and Form Resutls

acgarcia
Can probe calibration affect form results?

Using TP20, 3 way (T-shaped) build. Taking about 50 vector points around a cylinder and constructing a cylinder (least squared). Output cylindricity and it measured 0.0024" yesterday afternoon. Calibrated the probe this morning, re ran the same part and cylindercity measured 0.0011". All the other diameters and distances measured were different by 0.0001"-0.0002".
Parents
  • Calibration can absolutely affect the form when using multiple styli to determine one shape.
    As can residue, dust, oil, or any other FOD on the parts, cal sphere, or any of the 3 styli tips.
    Depending on your probe length and weight, TP20's SF should be able to reproduce with 1.6um variation per the brochure
    (these are from Renishaw "Data sheet_TP20-MCR20_EN.pdf", Issued 0505 Part no. H-1000-2064-02-B)

    Haaha notice TP20 is being probed at 8mm/sec probe speed, THAT'S FAST!!! I was always told 2mm/sec for TP20.
    ​ ​​
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  • Calibration can absolutely affect the form when using multiple styli to determine one shape.
    As can residue, dust, oil, or any other FOD on the parts, cal sphere, or any of the 3 styli tips.
    Depending on your probe length and weight, TP20's SF should be able to reproduce with 1.6um variation per the brochure
    (these are from Renishaw "Data sheet_TP20-MCR20_EN.pdf", Issued 0505 Part no. H-1000-2064-02-B)

    Haaha notice TP20 is being probed at 8mm/sec probe speed, THAT'S FAST!!! I was always told 2mm/sec for TP20.
    ​ ​​
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