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wacky roundness results


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Howdy, Has anyone encountered this issue of the roundness plot showing a skewed measurement? Measuring a circle with 2x 180*paths using a horizontal probe 12" long DK9 L113 with a 200mm thermo fitpro extension CF shaft ruby tip Vast XTR head. I've requalified using dyn tens and tensor ,100mN force with 50-40-30% dynamic on 30mm RF with no change in sigma value or improvements in results. 

Happy to answer any questions. 

 

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PlotProtocol.pdf

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I am maneuvering around magnets hence the long probe setup, ive followed these parameters from a prior thread attached. I just tired the circle paths offset 90* with little change. 

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I've seen similar issues in the past and could never get an answer as to why.  Calypso has a button in the circle strategy that will "Group" the 2 circle paths to be identified as one.  Never understood why "all" the data isn't associated with the circle.  

Screenshot 2025-04-18 071259.jpg

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