Rectangular True Position Explanation

[[Ba...]]

Engineering is questioning the report out of a rectangular true position in two axis.
"Also, some of these positions are reporting separately in the Y and Z directions. Can these be reported as the resultant true position of those two components?"
Thoughts???

[[Jo...]]

Like this ?

Capture.JPG

[[Ro...]]

Hi Barbara,
Maybe I'm misunderstanding. Rectangular position is reported as 2 results: 1 in each axis. It's a linear tolerance zone, so using a combined position could be misleading, as it's not using a diametrical/equidistant tolerance zone.

If you had a 1x4 rectangular tolerance zone and combined the results using diametrical TP calculation, you could have results that were good or bad depending on which direction the feature is out in. i.e It could be fine if it's out 2 in X, but not in Y. A single result won't show that.

Hope that makes sense.

[[Ba...]]

Excellent explanations! I have had this conversation before but apparently was not clear (or convincing). Thanks!

[[Jo...]]

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To Robert's point. The X or Y individually only are 1/2 of the components. Together they represent a combined position. Select the Rectangle instead of Diametric option in Calypso to have control over each axis tolerance . Select additional printout in your report to see each component X and Y . Maybe that information will clarify the error for anyone questioning the result. The graphic I posted was actually an X Y graph with two data providers in PiWeb. You can choose what measurements to correlate, even if not using True Position That is how I created an unequally disposed tolerance band.

[[Ba...]]

And just like that, Engineering is changing the tolerance block to Diametrical, which is what was wanted but dot displayed.
Thanks all for your input!