Calibration for star probes

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  • Calibration for star probes

    I have a MIH probe head and have calibrated all the probes (1 - 5) configured as a star probe with the head at A0B0. I then turned the head to A90B0 and calibrated all the probes in the orientation. When I check all the probes to a plane in the Z axis, the A0B0 check within .00013", but with it at A90B0 they all check .043 - .044". What is going on? I need help! thanks

  • #2
    Go here to start...
    http://pcdmisforum.com/attachment.ph...5&d=1158259178

    then try this one...
    http://www.box.net/public/6db96oashp
    sigpic

    James Mannes

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    • #3
      This might help too.

      http://pcdmisforum.com/showthread.php?t=2816

      Also, how long is the probe? It may weigh too much. Does it cause false triggers?
      When in doubt, post code. A second set of eyes might see something you missed.
      sigpic

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      • #4
        Originally posted by John Kingston View Post
        .........Also, how long is the probe.......?
        Let's try and stay on topic John. Why are you always dragging things in this direction?
        <internet bumper sticker goes here>

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        • #5
          Originally posted by craiger_ny View Post
          Let's try and stay on topic John. Why are you always dragging things in this direction?
          Because your probe was too short......
          When in doubt, post code. A second set of eyes might see something you missed.
          sigpic

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          • #6
            The #1 probe is 3mm dia x 20mm long. All others are 3mm dia x 36mm long. I am using a medium force TP20 trigger probe. I have had a few false triggers, but for the most part it works fine. I do plan on buying an extended force trigger probe as soon as our company lets us buy equipment again. I will try and align the probes again and then recalibrate. I did have it aligned quite well, but will do it again.

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            • #7
              I have realigned the probes and recalibrated starting with #1 and then #2 - #5. I then recalibrated again. But, I'm still getting these results: #1 = .06313"; #2 = .04071"; #3 = .03970"; #4 = .04123" #5 = .04038". What else can be done? HELP!!!

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              • #8
                It is the TP20 probe. The "pull" trigger is terrible and will cause your tip cals on star probes to suck pretty bad.
                Links to my utilities for PCDMIS

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                • #9
                  So what should I do now!

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                  • #10
                    Well we usually advise at this point that you should begin drinking heavily and seriously consider a career change! But. . . if that course of action does not appeal to you. . . You really only have a few choices. 1) Use small and lighter tips. 2) Beg, borrow, steal, or purchase a tp2. 3) Program or reprogram to inspect the part using a single tip and many wrist angles. HTH
                    sigpic"Hated by Many, Loved by Few" _ A.B. - Stone brewery

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