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Horizontal CMM Experience? Looking for info...

Mystic_Muffin
Anyone have experience running a horizontal CMM?

We have a customer that's run one of our fixtures and it checked good here and at 3rd party, but they're getting a bunch of Z axis points out.

I know their machine hasn't been calibrated in 5 years, but are there any horizontal CMM quirks that cause sagging in the Z or anything? I know nothing about horizontal setups... The deviation is around .15 in the center and around .35 down the X.... again, only points primarily with a Z approach.

Thanks for the insight.... I'm confused :/
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  • Two questions:
    Did you verify that your CMM program was outputting good numbers by checking some dimensions through other inspection means?
    Are all three of you using the exact same program?

    If yes and yes...and if 2 out of 3 are saying its good, and the 1 saying they are having issues hasn't been calibrated in 5 years...... then I think we have found our issue.

    To 's point....I hate horizontal CMMs due to the exact issues he has laid out. There is a fine science that must be learned & applied in order to measure properly and accurately.
  • in reply to DAN_M
    Man, I've actually been doing this as I've been talking to you guys. I'm doing a basic ball bar setup on one of our machines (we're calibrated every few months or sooner if an oopsie happens)... I'll send them the bar and ask them to run the same program and see their results. Getting the fixture back is kinda tough as it's in a different country. I'm hoping proving the repeatability of the machine along with the calibration records will be enough.

    The company trusts their machine and their operator, hopefully not regardless of the numbers I provide. I think he's got them bamboozled pretty hard.
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  • in reply to DAN_M
    Man, I've actually been doing this as I've been talking to you guys. I'm doing a basic ball bar setup on one of our machines (we're calibrated every few months or sooner if an oopsie happens)... I'll send them the bar and ask them to run the same program and see their results. Getting the fixture back is kinda tough as it's in a different country. I'm hoping proving the repeatability of the machine along with the calibration records will be enough.

    The company trusts their machine and their operator, hopefully not regardless of the numbers I provide. I think he's got them bamboozled pretty hard.
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