How do you straighten fixtures on your CMM?



We have a Hexagon Global CMM running PCDMIS with an articulating joint and scanning head. There’s M8 threaded holes in the table. Shoulder bolts in these holes aren’t necessarily straight to the machine travel, so we want to clamp a rail along one side to push fixtures up against so they’ll be reasonably straight.

I can’t see any decent way of attaching an indicator to the head, as there’s no external threaded holes to use and I’m very worried about the mass load using a clamp system.

I’d like to expose a DRO window in PCDMIS so I can probe points in space on the rails and use a global coordinate system to knock the rails straight, but I don’t see any obvious way of doing it. I think Calypso has something like this but I’m striking out on doing it in PCDMIS.

How do you guys do it?

submitted by /u/ShatterStorm
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