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?
Total runout and circular runout are being applied to the plane. not the datum B cylinder. circular runout only applies to one circular element at a time. Total runout applies to the entire surface combined. So if you only have one row of hits on datum A then the two values will be identical.
Total runout and circular runout are being applied to the plane. not the datum B cylinder. circular runout only applies to one circular element at a time. Total runout applies to the entire surface combined. So if you only have one row of hits on datum A then the two values will be identical.
