hexagon logo

Horizontal CMM Experience? Looking for info...

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 :/
Parents
  • I think not being calibrated in 5 years may be a tell tale sign, also if It's pretty old it probably won't have the accuracy of your bridge or your 3rd party. Also, horizontal arm machines tend to be bigger, hence less accurate. There are probably more factors than listed here including temperature compensation etc.
    We run 2 horizontal machines here and regularly have sphere checks fail around 0.1 - 0.2mm.
    Also do they mount the fixture the same as you on blocks or flat on the bed, is there sag in the fixture naturally?
Reply
  • I think not being calibrated in 5 years may be a tell tale sign, also if It's pretty old it probably won't have the accuracy of your bridge or your 3rd party. Also, horizontal arm machines tend to be bigger, hence less accurate. There are probably more factors than listed here including temperature compensation etc.
    We run 2 horizontal machines here and regularly have sphere checks fail around 0.1 - 0.2mm.
    Also do they mount the fixture the same as you on blocks or flat on the bed, is there sag in the fixture naturally?
Children