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CMM Health

acgarcia
Good Afternoon Everyone,

We are starting a CMM health initiative to help trust the CMMs. As of right now, operators can only run parts and the probe calibration program. Management is looking into something like check an artifact of known size weekly or even daily. I have (4) 454 SFs with (3) with manual heads and (1) with an indexing head, (3) Tigos with fixed analog heads, and (1) 7.10.7 Sf with an indexing head.

What kind of artifacts do you all check on a regular basis for CMM confidence? Rings gages? Gage blocks? An actual machine'd part? If its a machine'd part, do you check on 1 CMM to compare to other CMMs? OR does the human check it with hand tools and then looks for correlation? I know Hexagon has the swift check thing but I think its only for indexing heads so it won't work with all my CMMs.

Any advice? Thanks.
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  • That's kind of what I was wondering about. Like if you have a big awkward part with a profile of a surface: Are you just grabbing some gauge points and throwing an indicator at it to get an idea of where the surface probably is?

    You have a pretty solid process there. I do it similarly but I don't have an official form for it. I just make sure that I'm the one who proves out the program and I go measure the part with hand tools as well to check the validity of the program.

    For profiles:

    We would double check it with another CMM. Load the same program on two CMMs and correlate the output.

    We also use Inspection Mylar with an optical comparator
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  • That's kind of what I was wondering about. Like if you have a big awkward part with a profile of a surface: Are you just grabbing some gauge points and throwing an indicator at it to get an idea of where the surface probably is?

    You have a pretty solid process there. I do it similarly but I don't have an official form for it. I just make sure that I'm the one who proves out the program and I go measure the part with hand tools as well to check the validity of the program.

    For profiles:

    We would double check it with another CMM. Load the same program on two CMMs and correlate the output.

    We also use Inspection Mylar with an optical comparator
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