hexagon logo
Register Sign in
  • Replies 24 replies
  • Subscribers 224 subscribers
  • Views 800 views
  • Users 0 members are here
Options
Related

Adding Probe Angles AFTER Calibration Sphere has been moved

CarbideEVO
Good morning everyone,

After searching the forum (seems using google to do it gets better results!), I can't find a clear answer to this question that has been asked many times Confused Rolling eyes :

After calibrating A0B0, and additional angles - If I move the sphere, but discover I need additional angles, I would recalibrate all previous angles, and the new angles.

However, I read people saying this is unnecessary - as long as I recalibrate A0B0, and select "Yes, the sphere has moved" (because it has!), and measure the NEW angles..

that the previously calibrated angles and the newly added angles will all related to each other.

Is this true? Is this explained in the help file? What is the source of your information?

Thank you for your time!
Parents
  • if you calibrate the master probe and just the new angles, the likelihood of the existing probe angles not correlating with the new ones (or being shifted from the master) is bound to be higher.


    IF the master probe is always kept at nominal offsets (only 'calibrated' with "YES, the sphere has moved") and all the other tips/angles are calibrated with "NO, the sphere hasn't moved"), the 'level of uncertainty' is the same for all tips/angles (=one measurement of the datum sphere + one calibration) even if you don't calibrate them all at the same time. Of course, the uncertainty could go in different directions from one localisation of the datum to the next, but for normal use cases this should be enough.
  • in reply to AndersI
    Given you are in a controlled environment and nobody altered the current state of your probes (bends or other possible contributors to unexpected variation since that probe's last calibration), correct?

    If you have the CMM in a room that varies 10°F daily, and have sixteen (high turnover) operators running the machines 24/7, the chances of additional variation between probe calibrations caused by either damage or environment -that could be mitigated by a full probe cal- are certain.
Reply
  • in reply to AndersI
    Given you are in a controlled environment and nobody altered the current state of your probes (bends or other possible contributors to unexpected variation since that probe's last calibration), correct?

    If you have the CMM in a room that varies 10°F daily, and have sixteen (high turnover) operators running the machines 24/7, the chances of additional variation between probe calibrations caused by either damage or environment -that could be mitigated by a full probe cal- are certain.
Children
No Data
© 2024 Hexagon AB and/or its subsidiaries. Privacy Policy | Cloud Services Agreement