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?
So if XactMeasure can't evaluate circular runout from a cylinder and will always report total runout, why is there even a circular runout option?
For some context, I'm trying to create a program for a part that will measure the complete and finished part. Prior to my arrival a few months ago, they had multiple programs for different machining operations. In comparing my reports to the previous programs, it seems the runout results are vastly different. A lot of them get circular runout by measuring a bore or a turn as a SINGLE circle. And some of them (including the one I'm comparing mine to) use a circle for a datum reference rather than a cylinder. If I'm understanding it correctly, neither are correct.
I have a feeling that the company I work for has been measuring runout incorrectly for years. So I have a dilemma here. Do I rock the boat and bring it up to them? I have a feeling my supervisor won't be happy with me and/or won't believe me. He doesn't trust the CMM any farther than he can throw it.
So if XactMeasure can't evaluate circular runout from a cylinder and will always report total runout, why is there even a circular runout option?
For some context, I'm trying to create a program for a part that will measure the complete and finished part. Prior to my arrival a few months ago, they had multiple programs for different machining operations. In comparing my reports to the previous programs, it seems the runout results are vastly different. A lot of them get circular runout by measuring a bore or a turn as a SINGLE circle. And some of them (including the one I'm comparing mine to) use a circle for a datum reference rather than a cylinder. If I'm understanding it correctly, neither are correct.
I have a feeling that the company I work for has been measuring runout incorrectly for years. So I have a dilemma here. Do I rock the boat and bring it up to them? I have a feeling my supervisor won't be happy with me and/or won't believe me. He doesn't trust the CMM any farther than he can throw it.
