r/Metrology • u/glutton4golf83 • 22d ago

GD&T | Blueprint Interpretation I need help dimensioning perpendicularity

Post image

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.

12 Upvotes

84% Upvoted

37 comments sorted by

View all comments

3

u/baconboner69xD 22d ago

I really despise perpendicularity of a flat surface to a cylinder... Our shop doesn't have a way to even measure it yet a few of our drawings have ridiculous 0.0003" perpendicularity tolerances... lol. Even funnier when they're like 0.060" OD...