[To...] Posted February 28, 2019 Share Posted February 28, 2019 Does anyone have a suggestion on how to correct the problem shown below? Sorry, no image. Apparently I have reached the "board attachment quota".... I'll try to explain what was on the picture. Close your eyes and imagine measuring 180° of an OD circle in the X axis with #2 probe and then the other 180° with the #4 probe. When looking at a roundness plot of this circle, the 2 paths appear to be offset from each other in the Z direction. Imagine how they would look if the plot would look if it was measured with the #3 probe as one complete circle. 🤣 🤣 🤣 Link to comment https://qualityforum.zeiss.com/topic/19174-measuring-circle-with-multiple-probes/ Share on other sites More sharing options...
[Er...] Posted February 28, 2019 Share Posted February 28, 2019 Have you grouped the two segments? So it is treated as one path. Or what the heck its called in english. I do this alot and I never have any problems, even with tight tolerances. Also, overlap them as much as possible. Link to comment https://qualityforum.zeiss.com/topic/19174-measuring-circle-with-multiple-probes/#findComment-107872 Share on other sites More sharing options...
[Ri...] Posted February 28, 2019 Share Posted February 28, 2019 I've seen this before. It usually is from "not as good" qualifications as you'd like. The way I always test this is to place a ring gage up on the machine, and measure it with both probes, and see what the offset is. Link to comment https://qualityforum.zeiss.com/topic/19174-measuring-circle-with-multiple-probes/#findComment-107874 Share on other sites More sharing options...
[Ro...] Posted March 1, 2019 Share Posted March 1, 2019 If you're using an XXT i would guess its a qualification issue. It happens quite a bit on my brown & sharpes, usually a requal fixes it fast. but my Zeiss has an XT so i don't usually get those issues. Link to comment https://qualityforum.zeiss.com/topic/19174-measuring-circle-with-multiple-probes/#findComment-107876 Share on other sites More sharing options...
[Ow...] Posted March 1, 2019 Share Posted March 1, 2019 I've got a Vast Gold and have seen this happen using 200mm extensions. Re-qualify the probes and it went away. Link to comment https://qualityforum.zeiss.com/topic/19174-measuring-circle-with-multiple-probes/#findComment-107878 Share on other sites More sharing options...
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