[Ri...] Posted June 17, 2025 Share Posted June 17, 2025 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. Link to comment https://qualityforum.zeiss.com/topic/23735-strange-scans-from-l-probes-on-rds-xxt-sensor/ Share on other sites More sharing options...
[Cl...] Posted June 17, 2025 Share Posted June 17, 2025 What's the surface finish like? Link to comment https://qualityforum.zeiss.com/topic/23735-strange-scans-from-l-probes-on-rds-xxt-sensor/#findComment-133947 Share on other sites More sharing options...
[Ri...] Posted June 18, 2025 Author Share Posted June 18, 2025 Excellent, we even found he same condition on Ring Gages. Link to comment https://qualityforum.zeiss.com/topic/23735-strange-scans-from-l-probes-on-rds-xxt-sensor/#findComment-133983 Share on other sites More sharing options...
[Cl...] Posted June 18, 2025 Share Posted June 18, 2025 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 https://qualityforum.zeiss.com/topic/23735-strange-scans-from-l-probes-on-rds-xxt-sensor/#findComment-133987 Share on other sites More sharing options...
[To...] Posted June 18, 2025 Share Posted June 18, 2025 (edited) This is typical for the XXT sensor due to way the probe deflects. Nothing to see here. Edited June 18, 2025 Link to comment https://qualityforum.zeiss.com/topic/23735-strange-scans-from-l-probes-on-rds-xxt-sensor/#findComment-134003 Share on other sites More sharing options...
[Ri...] Posted June 18, 2025 Author Share Posted June 18, 2025 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 https://qualityforum.zeiss.com/topic/23735-strange-scans-from-l-probes-on-rds-xxt-sensor/#findComment-134007 Share on other sites More sharing options...
[To...] Posted June 18, 2025 Share Posted June 18, 2025 (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 June 18, 2025 1 Link to comment https://qualityforum.zeiss.com/topic/23735-strange-scans-from-l-probes-on-rds-xxt-sensor/#findComment-134011 Share on other sites More sharing options...
[Ri...] Posted June 18, 2025 Author Share Posted June 18, 2025 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 https://qualityforum.zeiss.com/topic/23735-strange-scans-from-l-probes-on-rds-xxt-sensor/#findComment-134023 Share on other sites More sharing options...
[Ch...] Posted June 18, 2025 Share Posted June 18, 2025 Please sign in to view this quote. Additional details on the ZEISS Knowledge Base - VAST XXT: Normal Vector of Measured Points Link to comment https://qualityforum.zeiss.com/topic/23735-strange-scans-from-l-probes-on-rds-xxt-sensor/#findComment-134041 Share on other sites More sharing options...
[Ri...] Posted June 18, 2025 Author Share Posted June 18, 2025 Please sign in to view this quote. Thank you, it's still odd I have not seen this before. Link to comment https://qualityforum.zeiss.com/topic/23735-strange-scans-from-l-probes-on-rds-xxt-sensor/#findComment-134053 Share on other sites More sharing options...
[Ri...] Posted June 23, 2025 Author Share Posted June 23, 2025 Can an Admin remove the first image in my first post of this thread? Thank you. Link to comment https://qualityforum.zeiss.com/topic/23735-strange-scans-from-l-probes-on-rds-xxt-sensor/#findComment-134177 Share on other sites More sharing options...
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