[Ri...] Posted Tuesday at 07:26 PM Share Posted Tuesday at 07:26 PM (edited) What could cause an L probe to create nominals like these in the images attached. Also note, when the L probe is scanning the circle the Y axis oscillates approximately 140microns on one CMM and appears to be worse on another CMM. The vector direction changes at 180° to the opposite. The probe tip is not in contact with any other surfaces during the circle scan. Edited Tuesday at 07:27 PM Link to comment Share on other sites More sharing options...
[Cl...] Posted Tuesday at 07:55 PM Share Posted Tuesday at 07:55 PM What's the surface finish like? Link to comment Share on other sites More sharing options...
[Ri...] Posted Wednesday at 10:43 AM Author Share Posted Wednesday at 10:43 AM Excellent, we even found he same condition on Ring Gages. Link to comment Share on other sites More sharing options...
[Cl...] Posted Wednesday at 10:55 AM Share Posted Wednesday at 10:55 AM I use these types of L-probes a lot and don't see the problem you are seeing. Could the ruby have an imperfection on it? A crack, flat spot, a chip, etc. Link to comment Share on other sites More sharing options...
[To...] Posted Wednesday at 11:54 AM Share Posted Wednesday at 11:54 AM (edited) This is typical for the XXT sensor due to way the probe deflects. Nothing to see here. Edited Wednesday at 11:55 AM Link to comment Share on other sites More sharing options...
[Ri...] Posted Wednesday at 12:09 PM Author Share Posted Wednesday at 12:09 PM Please sign in to view this quote. This doesn't happen on my CMMs. Particularly the oscillation of the Y axis. On the affected CMM's (another shop), when the part is aligned to .0004" or less (In the X axis) the Y axis moves +Y .005-.006" and then at 180° of the circles, moves back -Y .005-.006" (Approximately 140 micron) I performed the same test on my CMM's, and the Y axis movement was nearly unnoticeable on an .0005" indicator. Whether using a VAAST XT, or RDS XXT I have never seen this before using any type of probe configuration. Link to comment Share on other sites More sharing options...
[To...] Posted Wednesday at 12:18 PM Share Posted Wednesday at 12:18 PM (edited) Please sign in to view this quote. I see it all the time when using a star or horizontal stylus. Just to be clear, I am referring to the change in the probe vectors. I’m not sure where you are picking up the oscillation values from. I also verify that I am maintaining at least a 3 to 1 ration of form to sigma. Quite often it is 10 to 1. Edited Wednesday at 12:38 PM 1 Link to comment Share on other sites More sharing options...
[Ri...] Posted Wednesday at 02:06 PM Author Share Posted Wednesday at 02:06 PM Please sign in to view this quote. Odd that I have never seen this and I always pay attention to the touch or scanned points. The oscillation, I think is due to third party calibration. Link to comment Share on other sites More sharing options...
[Ch...] Posted Wednesday at 03:00 PM Share Posted Wednesday at 03:00 PM Please sign in to view this quote. Additional details on the ZEISS Knowledge Base - VAST XXT: Normal Vector of Measured Points Link to comment Share on other sites More sharing options...
[Ri...] Posted Wednesday at 05:50 PM Author Share Posted Wednesday at 05:50 PM Please sign in to view this quote. Thank you, it's still odd I have not seen this before. Link to comment Share on other sites More sharing options...
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