[Me...] Posted April 24, 2019 Share Posted April 24, 2019 Does anyone know how perpendicularity is calculated within Calypso? It doesn't make sense to me that I can have an A2 value of almost 6, but the perp value is .420. Does anyone know what's going on?Perp Reading.PNGA2 Reading.PNG Link to comment https://qualityforum.zeiss.com/topic/18672-perpendicularity/ Share on other sites More sharing options...
[Mi...] Posted April 24, 2019 Share Posted April 24, 2019 It should be something like the attached. With a length of 4.022, this should come out to approximately 4.022*sin(5.96°)=.4176... which is nearly what Calypso generated. (The difference is that I ignored the A1 value for simplicity)05-Perpendicularity-axis-tolerance-zone.jpg Link to comment https://qualityforum.zeiss.com/topic/18672-perpendicularity/#findComment-105128 Share on other sites More sharing options...
[Me...] Posted April 24, 2019 Author Share Posted April 24, 2019 Thank you for your help. Link to comment https://qualityforum.zeiss.com/topic/18672-perpendicularity/#findComment-105130 Share on other sites More sharing options...
[Da...] Posted April 25, 2019 Share Posted April 25, 2019 Mike, also the A1 and A2 values are in decimal degrees, the perpendicularity number is the size of the perp zone. Link to comment https://qualityforum.zeiss.com/topic/18672-perpendicularity/#findComment-105132 Share on other sites More sharing options...
[An...] Posted April 26, 2019 Share Posted April 26, 2019 Please sign in to view this quote. A2 yields 0.41762087 A1 and A2 yield 0.41762107 It's a matter of rounding. Link to comment https://qualityforum.zeiss.com/topic/18672-perpendicularity/#findComment-105134 Share on other sites More sharing options...
[Mi...] Posted April 26, 2019 Share Posted April 26, 2019 Please sign in to view this quote. Yeah, after posting it occurred to me that that probably wouldn't explain the whole difference. As an aside, I suppose we don't really know that datum A was used in the base alignment anyway, so the angles may not even be relevant. Link to comment https://qualityforum.zeiss.com/topic/18672-perpendicularity/#findComment-105136 Share on other sites More sharing options...
[To...] Posted May 8, 2019 Share Posted May 8, 2019 And, it is common for features to be LSQ and the datum feature to be OTE. Link to comment https://qualityforum.zeiss.com/topic/18672-perpendicularity/#findComment-105138 Share on other sites More sharing options...
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