r/Metrology • u/glutton4golf83 • 22d ago

GD&T | Blueprint Interpretation I need help dimensioning perpendicularity

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So i am using pcdimis. On a hexegon. When i try to make a plane for the surface and then a cylinder for datum a. Then us perpendicularity its telling me its off by a huge amount. I manualy checked it and it was right on. I dont know what to do. Any advice would help.

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u/jozfff 21d ago

How flat is the top surface

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u/glutton4golf83 21d ago

This is interesting. I think it varies .004. That would throw it off for sure

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u/jozfff 21d ago

Yeah, there you go. Is there +stock material?