I have a bore that is Datum B. It has a perpendicularity callout to Datum A, which is a flat surface. So, I have to measure it as a cylinder. I have another bore that has a circular runout callout to AB. So do I have to measure B again as a circle? Because I would have to assign that as another datum to build the feature control frame. But if I just use B as a cylinder, then wouldn't it be measuring total runout and give me a different result than circular runout?
Since you want to know the perp of C, it must be measured as a cylinder or several circles that are used to create a cylinder used in the perp eval (and total runout).
Since you want to know the perp of C, it must be measured as a cylinder or several circles that are used to create a cylinder used in the perp eval (and total runout).
