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B89 Calibration Question

We sent a PO to Hex to do a B89 on our machine. Same PO, word for word, that was sent to them last year.

They show up, do the calibration, but this time there is a "Temperature Compensation Addendum" added to the end of the cert. That was not on our cert last year.


When the tech came to my shop-->
The technician asked me if we used temp comp and I told him "No. The machine has it and it functions properly, we don't use it though." He then said "Because you don't use temp come, I am going to...." and I politely cut him off and said "I need you to perform the exact service listed on the PO. If you can't do that for whatever reason, we need to change the PO before you proceed." He agreed to this verbally in the presence of myself as well as our calibration mgr.


Fast forward...he leaves for the day and then emails us a cert that has "Temperature Compensation Addendum" on the end.
*note that is says on their own service report that even though the cmm was in the shop it meets the qualifications for the environmental portion of the b89 spec*.

This confused us very much. I felt like he looked me in the eyes and disregarded my very clear instructions as well as our PO.

I called Hex and they swear up and down that "Temperature Compensation Addendum" changes noting about the calibration and that it was the exact same calibration that they did last year.

I do not have a good feeling about this.

The calibration status of our machines are tied to FROZEN aerospace process flow maps that CAN NOT be altered unless we go through customer audit & yaddayadda. Our quality team rejected the cert and issued a stop payment for the PO.

ad·den·dum
/əˈdendəm/
noun
  1. 1.
    an item of additional material, typically omissions, added at the end of a book or other publication.
Am I crazy for thinking there is an issue here? Am waiting to hear back from the service team as we speak. Any input/thoughts/comments would be appreciated
Parents
  • No answer to this, just a question : why don't you use thermal compensation ?
    On a Global, it takes into account of thermal pitch Y and on some others also on X.
    These are noy big defects on little cmms, but with a Z of 1 meter, you can see differences...

    On some versions / controllers, you can choose "compensate axes only", if you don't want to compensate the part.
    It's also the option to use when rotary is present (but not with a DC800 + V2020 Disappointed )


    Our shop environment stays between 68°-75°. Regardless of what the temperature is, it never fluctuates more than 1° per day. The humidity in our shop is also controlled. The CMM is right near the CNC line it supports so parts are being measured at the same temp they're being manufactured at.

    All things considered, we have no need to use it so I never do Slight smile

    The only thing I use it for is to record the temp of insp on a report for one customer's part....which brings me to my next point...if Hex has a Temperature Compensation Addendum on my report can I even use the temp censor anymore to tell my aerospace customer what the temp is? ConfusedAngryConfusedAngry
Reply
  • No answer to this, just a question : why don't you use thermal compensation ?
    On a Global, it takes into account of thermal pitch Y and on some others also on X.
    These are noy big defects on little cmms, but with a Z of 1 meter, you can see differences...

    On some versions / controllers, you can choose "compensate axes only", if you don't want to compensate the part.
    It's also the option to use when rotary is present (but not with a DC800 + V2020 Disappointed )


    Our shop environment stays between 68°-75°. Regardless of what the temperature is, it never fluctuates more than 1° per day. The humidity in our shop is also controlled. The CMM is right near the CNC line it supports so parts are being measured at the same temp they're being manufactured at.

    All things considered, we have no need to use it so I never do Slight smile

    The only thing I use it for is to record the temp of insp on a report for one customer's part....which brings me to my next point...if Hex has a Temperature Compensation Addendum on my report can I even use the temp censor anymore to tell my aerospace customer what the temp is? ConfusedAngryConfusedAngry
Children
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