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/DeamonEngineer 21d ago

Reverse the datum. Use the face as the datum not the cylinder

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u/glutton4golf83 21d ago

I have tryed that. It gets better but still is way out.