Multiple Sphere Calibration

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  • Multiple Sphere Calibration

    We do a lot of probing with star probes and other oddly configured tips and we're looking for a better alternative than moving our calibration sphere frequently. We are currently using a 1" sphere in a 30 degree angle base and frequently move it vertical or to 45 degrees. Would anyone recommend a 5 sphere setup.

  • #2
    As far as I understand, you would be fine with 2; at least one being offset by 45 degrees or something. There is a dual ball calibration artifact that should take care of measuring the entire start probe, at least.
    May I ask why you're looking into 5?

    Edit:
    https://www.pcdmisforum.com/forum/pc...ed-calibration
    https://www.pcdmisforum.com/forum/pc...-changing-tips

    These two links should explain more in depth what I'm referring to
    Last edited by InspectorJester; 11-02-2018, 03:02 AM.

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    • #3
      Maybe something like this would do? I'm getting our tool room to make this up in the coming months.

      It will allow a full qualification of the standard tips and the star probe in one program with no adjustments to be made
      qual tool.JPG .
      Attached Files

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      • #4
        Originally posted by InspectorJester View Post
        As far as I understand, you would be fine with 2; at least one being offset by 45 degrees or something. There is a dual ball calibration artifact that should take care of measuring the entire start probe, at least.
        May I ask why you're looking into 5?

        Edit:
        https://www.pcdmisforum.com/forum/pc...ed-calibration
        https://www.pcdmisforum.com/forum/pc...-changing-tips

        These two links should explain more in depth what I'm referring to
        The Quality Manager found it and thought it provided the most flexibility.

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        • #5
          2 sphere's is possible that I've seen, however it is mostly done with 3 spheres. concept for each:
          2 Spheres: 1 sphere pointed Yplus/Zplus(+45º), 1 sphere pointed Yminus/Zplus(-45º). Vectors would be the .7071's respectably (Or 1 sphere that can be rotated 180º about Z in-between)
          3 Spheres: 1 sphere pointed Xplus(90º), 1 sphere pointed Yplus(90º), 1 sphere pointed Zplus(0º)

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          • #6
            InspectorJester: Thanks, we did wind up going with the 2 ball artifact at 45 degrees.

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