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.

[[Pa...]]

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 I am working with my local partner. I wanted to post this to the community at large in order to see if anyone else has run into this issue as well. The actual measurement should just be calculated from the Min/max distance. The calculation is straightforward according to ASME Y14.5.1, You need to calculate the growth parameter g.  In the above example g = actual value - U tolerance. In this case g=.024". The reported actual tolerance should be 2g + tolerance or .071". In the above example the actual tolerance is reported as .107". So either I am not calculating this correctly or the software is not calculating this correctly. I have made a spreadsheet calculator and have checked results against zeiss inspect. In most other cases Zeiss inspect calculates the correct result. In the above case it seems like the software is taking the max and min and adding them together. Then it is doubling that value. Here is a screenshot of my calculator:

 

Edited 15 hours ago
Put in wrong value. Again.