[Cl...] Posted July 30, 2021 Share Posted July 30, 2021 Does anyone know anything about the 0.0090 setting highlighted in yellow? I understand what the highlighted 40 is. It is the angle of the surface being scanned. No idea why the wavelength for filter setting is 0.0090? Link to comment https://qualityforum.zeiss.com/topic/12300-circle-in-contour-bets-fit/ Share on other sites More sharing options...
[Da...] Posted July 30, 2021 Share Posted July 30, 2021 My best guess would be that it's a cutoff value for a low-pass filter. Link to comment https://qualityforum.zeiss.com/topic/12300-circle-in-contour-bets-fit/#findComment-61526 Share on other sites More sharing options...
[Cl...] Posted July 30, 2021 Author Share Posted July 30, 2021 Please sign in to view this quote. Is that curve length /2? Link to comment https://qualityforum.zeiss.com/topic/12300-circle-in-contour-bets-fit/#findComment-61528 Share on other sites More sharing options...
[Da...] Posted August 9, 2021 Share Posted August 9, 2021 Half your curve length is the maximum wavelength cutoff that can be applied. You'll most likely use a cutoff value much smaller than that. Depending on the surface finish or the method of manufacture, you may see a lot of high frequency variation in your measurement. If you don't want to fit a circle to those high frequency points, set the filter to a value where you see that they have been sufficiently suppressed. Depending on the curve length, stylus diameter, and surface finish the proper cutoff value could typically be anywhere from 0.08 mm + Most parts I see where I need to apply a filter to is usually in the range of 0.8 - 2.5 mm Link to comment https://qualityforum.zeiss.com/topic/12300-circle-in-contour-bets-fit/#findComment-61530 Share on other sites More sharing options...
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