Surface Profile Tolerance Not Calculated Properly

[[Pa...]]

I have a part we have scanned with an ATOS 200. I am comparing the scanned part to CAD. I am measuring in inches. I have created a nominal surface using patch compound from CAD. I have created a fitting element for this surface. I have then created a surface profile tolerance of this surface. 

 

The profile tolerance is an unequally disposed tolerance of .023U.003 to datum A. I am using ASME Y14.5 for my standard. The reported result looks like this:

 

The statistics look like this:

If I manually calculate the tolerance from the statistics I get an actual tolerance of .071". I have triple checked my manual calculation with respect to ASME Y14.5.1 2019. 

Why do I get a different value from the reported value?

 

-Paul

 

[[Ch...]]

Without a closer look look into your project it is hard to give a good answer. Therefore please contact you local partner to view your project together.