CMM stuttering during linear open scans

Hello,

Wondering if someone can help me. I amusing a star probe to scan a cylinder with a linear open. The probe seems to intermittently "stutter" during the scan and reports an error for workpiece lost contact. Wondering if anyone has had this issue and has any idea what might cause it.

The other thing is it seems to happen more in the morning after being unused all night but by the afternoon the problem largely clears up. Wondering if it is possibly something mechanical.

Thanks

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BIGWIG7 over 1 year ago

there's a few things potentially going on here.
1. the artifact you're checking is vibrating.
2. the star probe you are using is vibrating because
a. the star probe is long and not stable
b. the angle you are using is to "unnormal" to the surface you're scanning
c. the surface you are scanning is not smooth enough
3. you are scanning too fast/slow
4. the machine is cold and you need to cycle it a few times to get it warmed up. I have a quick 10minute program i run every morning where the machine just cycles around the table a few dozen times to stretch it's legs.
5. did you use the scanRDV calibration method?

good luck
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BIGWIG7 over 1 year ago

there's a few things potentially going on here.
1. the artifact you're checking is vibrating.
2. the star probe you are using is vibrating because
a. the star probe is long and not stable
b. the angle you are using is to "unnormal" to the surface you're scanning
c. the surface you are scanning is not smooth enough
3. you are scanning too fast/slow
4. the machine is cold and you need to cycle it a few times to get it warmed up. I have a quick 10minute program i run every morning where the machine just cycles around the table a few dozen times to stretch it's legs.
5. did you use the scanRDV calibration method?

good luck
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