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Probe drifting into groove wall while scanning

A_Singer
I'm pretty new to scanning, haven't taken the class yet but having an experienced programmer help me with it when he's available.

I'm trying to do a perimeter scan on the bottom of this groove that runs continuously around the part. My probe is oriented A0B0 and my scan path is in the middle of the groove and I have a moderate amount of clearance between the side walls of the groove and my probe.

the groove goes a few inches straight in X+ and then has a 28 degree angle towards Y+ and loops around with radii on all the corners. Z is constant.

So despite my scanning looking like it should be fine, I'm finding that on the first radius after the bend, it's colliding into the side wall. my scan speed is at 2.5 mm/sec so it's not going too fast for a Global S.

Any ideas why it might be having this issue?
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  • bad part? if it is a defined scan, and it is 'drifting' into the side, then either the alignment isn't right or the part isn't right.

    Your scan settings look fine. I think Matt had it right. I'd look closer at the alignments or the part itself. If the groove path is just shifted too much, maybe you can make a temporary alignment on features that are near the groove to help target the scan.
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  • bad part? if it is a defined scan, and it is 'drifting' into the side, then either the alignment isn't right or the part isn't right.

    Your scan settings look fine. I think Matt had it right. I'd look closer at the alignments or the part itself. If the groove path is just shifted too much, maybe you can make a temporary alignment on features that are near the groove to help target the scan.
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