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?
With my above example being said...Measure -A- as a plane, -B- as a cylinder, and your evaluation diameter as a cylinder. You need 3d features so the software can evaluating the entire form of the datums back to the feature & not just one circular element on the bores
With my above example being said...Measure -A- as a plane, -B- as a cylinder, and your evaluation diameter as a cylinder. You need 3d features so the software can evaluating the entire form of the datums back to the feature & not just one circular element on the bores
