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Master Probe

Scott Brown
Good Afternoon

I have read a number of posts regarding probe calibration and using a Master probe to relate multiple probes. I have a few questions that I did not find the answers in the posts.
Question #1 - If you are using the Master probe for measurement does it affect the relationship of the other probes if you re-calibrate A0/B0 of the Master Probe after answering "N0" to the calibration sphere move. For example - Start of shift the Master probe is calibrated at A0 / B0 and you answer "Yes" the tooling sphere has moved. Now you open a program that uses the master probe for measurement. You want to perform a calibration on the angles that are used in the program. Perform a Marked Used which includes A0/B0. You answer "No" the tool has not moved and perform calibration. Is the relationship of the other probes and angles lost???

Question #2 - Is it necessary to calibrate Master Probe every time the machine is homed??

PC-DMIS 2014.1

Thanks for your help
Scott
Parents
  • Good Morning

    Thank-you for your responses, I now have a better understanding of the Master Probe concept. With regards to the resetting the tips, this is done on A0/BO of the master probe only??Do you reset the tips for the Master probe for machine homes??

    Thanks
    Scott

    In an "ideal Pcdmis world", the master probe is nothing more than an A0B0 file. Resetting it takes care of the "total calibration" routine. For the other probes will depend on who you talk to. Some say they should also be reset, BUT, if you have less than perfect hardware or a less than perfect alignment of the head, this can cause the other probes to fail to calibrate. If your head is (and always was) 3 degrees out of square, resetting a LONG probe can make it not run. They have added (over the years) extra things to the calibration routine, like DCC+DCC, but that doubles the calibration time (or close enough). Pcdmis used the CURRENT values of the calibration as the 'target' values for the next, helping to ensure that a non-perfect probe will run on future calibrations.
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  • Good Morning

    Thank-you for your responses, I now have a better understanding of the Master Probe concept. With regards to the resetting the tips, this is done on A0/BO of the master probe only??Do you reset the tips for the Master probe for machine homes??

    Thanks
    Scott

    In an "ideal Pcdmis world", the master probe is nothing more than an A0B0 file. Resetting it takes care of the "total calibration" routine. For the other probes will depend on who you talk to. Some say they should also be reset, BUT, if you have less than perfect hardware or a less than perfect alignment of the head, this can cause the other probes to fail to calibrate. If your head is (and always was) 3 degrees out of square, resetting a LONG probe can make it not run. They have added (over the years) extra things to the calibration routine, like DCC+DCC, but that doubles the calibration time (or close enough). Pcdmis used the CURRENT values of the calibration as the 'target' values for the next, helping to ensure that a non-perfect probe will run on future calibrations.
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