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SP25 calibration issue

Please note that this thread is not in the OFF TOPICS section, so only clever answers are welcome !!!

I greet you all, colleagues.
I have a small problem that tends to come and go when calibrating angles. I work with many styli and use a 9-slot magazine for this. Each stylus has about 10 different angle positions. When I did the calibration, two angles on different probes were out of tolerance. One probe has a CM25-2 probe and the other CM25-3. And at the same time, PSDMIS accepts the calibration result without asking the operator. The next day I did a similar calibration and the result was OK.And always out-of-tolerance angles equal to A90 or more than A90 It is very strange . I have been working in this mode for 3 years and there were no such problems. And this year it started. I check the probes visually and do the cleaning before each calibration the same way always. What could be the problem ?
Parents
  • I think the rotation head is missaligned, because of more than 1 mm difference between theo and meas on 2 axes at A90.
    In addition, you're using a 10 mm ball, so, function of the sphere stem, maybe some hits shank the stem (even if the std dev seems to be right.
    I don't know enough about SP25 to help you more...


    Could you change decimal place to 4 and post some results ?
    You could also change the sphere axis (for example I 0.707,J 0, K 0.707) and look at the results.
    Then, measure the sphere withe the same number of hits and the same number of rows, and check the form.
    Have a nice day, all.
Reply
  • I think the rotation head is missaligned, because of more than 1 mm difference between theo and meas on 2 axes at A90.
    In addition, you're using a 10 mm ball, so, function of the sphere stem, maybe some hits shank the stem (even if the std dev seems to be right.
    I don't know enough about SP25 to help you more...


    Could you change decimal place to 4 and post some results ?
    You could also change the sphere axis (for example I 0.707,J 0, K 0.707) and look at the results.
    Then, measure the sphere withe the same number of hits and the same number of rows, and check the form.
    Have a nice day, all.
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