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Suppose I have a tall post and a short raised circle. I want the center point of the outer circle to be constrained to lie on the axis of the post. Is the below setup correct? It looks like a job for a position control, but I don't have basic dimensions to the position since they would be 0. In the absence of dimensions, is it interpreted as aligned with that datum?

And does it make sense to reference only one datum in the feature control box, or does datum B below need to be my primary (assuming I only care about the circle being on the axis regardless of how crooked the post is relative to B)?

Or maybe the approach should be completely different and I should be using runout?

Assume ASME Y17.5 standards:

Suppose I have a tall post and a short raised circle. I want the center point of the outer circle to be constrained to lie on the axis of the post. Is the below setup correct? It looks like a job for a position control, but I don't have basic dimensions to the position since they would be 0. In the absence of dimensions, is it interpreted as aligned with that datum?

And does it make sense to reference only one datum in the feature control box, or does datum B below need to be my primary (assuming I only care about the circle being on the axis regardless of how crooked the post is relative to B)?

Or maybe the approach should be completely different and I should be using runout?

Suppose I have a tall post and a short raised circle. I want the center point of the outer circle to be constrained to lie on the axis of the post. Is the below setup correct? It looks like a job for a position control, but I don't have basic dimensions to the position since they would be 0. In the absence of dimensions, is it interpreted as aligned with that datum?

And does it make sense to reference only one datum in the feature control box, or does datum B below need to be my primary?

Or maybe the approach should be completely different and I should be using runout?

Suppose I have a tall post and a short raised circle. I want the center point of the outer circle to be constrained to lie on the axis of the post. Is the below setup correct? It looks like a job for a position control, but I don't have basic dimensions to the position since they would be 0. In the absence of dimensions, is it interpreted as aligned with that datum?

And does it make sense to reference only one datum in the feature control box, or does datum B below need to be my primary (assuming I only care about the circle being on the axis regardless of how crooked the post is relative to B)?

Or maybe the approach should be completely different and I should be using runout?

Suppose I have a tall post and a short raised circle. I want the center point of the outer circle to be constrained to lie on the axis of the post. Is the below setup correct? It looks like a job for a true position control, but I don't have basic dimensions to the position since they would be 0. In the absence of dimensions, is it interpreted as aligned with that datum?

And does it make sense to reference only one datum in the feature control box, or does datum B below need to be my primary?

Or maybe the approach should be completely different and I should be using runout?

Suppose I have a tall post and a short raised circle. I want the center point of the outer circle to be constrained to lie on the axis of the post. Is the below setup correct? It looks like a job for a position control, but I don't have basic dimensions to the position since they would be 0. In the absence of dimensions, is it interpreted as aligned with that datum?

And does it make sense to reference only one datum in the feature control box, or does datum B below need to be my primary?

Or maybe the approach should be completely different and I should be using runout?