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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
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  • Im sure since I'm not having a problem I got everything correct, but I need to learn the lingo of master probe and resetting the master probe.
    Help

    MASTER PROBE is more a concept than a 'real thing' you can point to. When using rack(s) it is (generally) the probe in "slot 1", "rack 1". What makes it 'master' is that it is THE PROBE you use to 'find' the qual tool EVERY TIME. As for resetting it, that is simply an option available in the probe utility window when you go to calibrate. It simple sets that probe FILE back to math-perfect values (from the definitions in the probe.dat file). The 'master' probe A0B0 should 'never' show any X, Y or Z deviations.

    To see what "master" looks like, you can build a new probe file, then calibrate it, and tell it YES the tool has moved, the A0B0 is what you use to 'find' the location with your single hit on top. It will then calibrate that and all the other angles in the file. When you look at the results, A0B0 will ONLY show a diameter deviation, the rest will show X, Y, Z, & D deviations from the math-perfect values. If you then use that probe to find the tool every time, the A0B0 will stay the same (except D) while all the others you calibrate will show some deviations in the XYZ values. This is what 'defines' the master probe.

    If, at a later time, you load up that "master probe" and calibrate A0B0 and tell it NO, you will see some small amount of XYZ deviation from math-perfect, even if you have NOT moved the tool since you 'found' it since no machine/probe/tool is perfect.
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  • Im sure since I'm not having a problem I got everything correct, but I need to learn the lingo of master probe and resetting the master probe.
    Help

    MASTER PROBE is more a concept than a 'real thing' you can point to. When using rack(s) it is (generally) the probe in "slot 1", "rack 1". What makes it 'master' is that it is THE PROBE you use to 'find' the qual tool EVERY TIME. As for resetting it, that is simply an option available in the probe utility window when you go to calibrate. It simple sets that probe FILE back to math-perfect values (from the definitions in the probe.dat file). The 'master' probe A0B0 should 'never' show any X, Y or Z deviations.

    To see what "master" looks like, you can build a new probe file, then calibrate it, and tell it YES the tool has moved, the A0B0 is what you use to 'find' the location with your single hit on top. It will then calibrate that and all the other angles in the file. When you look at the results, A0B0 will ONLY show a diameter deviation, the rest will show X, Y, Z, & D deviations from the math-perfect values. If you then use that probe to find the tool every time, the A0B0 will stay the same (except D) while all the others you calibrate will show some deviations in the XYZ values. This is what 'defines' the master probe.

    If, at a later time, you load up that "master probe" and calibrate A0B0 and tell it NO, you will see some small amount of XYZ deviation from math-perfect, even if you have NOT moved the tool since you 'found' it since no machine/probe/tool is perfect.
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