[Ma...] Posted November 1 Share Posted November 1 I was trying to measure a ring gage to correlate with our ULM system when I noticed that the dimensions were way different. Ring gage should have measured 2.99996 and CMM is measuring it at 3.00046 a difference of .0005. Have also checked gage blocks and getting error within .0005 - .00076. Machine is a Zeiss Prismo with a Vast Gold head. I have verified that the correct head is selected, the calibration sphere dimensions are accurate, requalified Master, and probe used for inspection has been calibrated as well. What am I missing? Is there something else that could be causing this error? Link to comment Share on other sites More sharing options...
[Ro...] Posted November 13 Share Posted November 13 For said ring gage, are you checking it as a max inscribed circle, or LSQ? Do you have filtering and outliers turned on? Temperature can also influence results, so might need to use temp comp as well. Link to comment Share on other sites More sharing options...
[DW...] Posted November 14 Share Posted November 14 Please sign in to view this quote. You are using the R value from the Zeiss certificate right? That's quite the error at 0.0005". Please list measurement strategy and evaluation settings, although with an error that high I would think there is physical damage to your equipment. Whats the probe sigma like? Link to comment Share on other sites More sharing options...
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