How would you capture this datum?

[[Ia...]]

Flag Note 4: "Datum A to consist of the inside surface, including the radius and flats".

I don't know how to make this a feature that can be used as a datum within Calypso.

[[Cl...]]

Just the surfaces shown? I'm assuming that -A- is primary? My first
thought was to use that longer straight edge on the bottom as a planar
rotation, then translate to the center of the radius?

[[Ia...]]

So do you think it should control just one translation?

[[Ke...]]

Please sign in to view this quote.

How is the datum applied? (to what features/orientations)?

[[Ia...]]

Please sign in to view this quote.

It applies to all profiles and all holes along the entirety of the part, which are on the radius, and both flats. A is primary datum in all control frames.

I guess this brings up a different question. Using the can may must rule, if it CAN and may constrain them, it has to right? Or would basic dimensions override that?

[[Da...]]

Unless it has from A--B or something like that it is only the Plane Not the entire surface

Capture.JPG

[[Da...]]

I'm Guessing Note 4 is the defining the Datum?

I would use a profile scan make it best fit from the two planes with Rotation and translation.
Then use that Best fit alignment to check the other features.

I will try it tomorrow when I have time.
Send Screenshots.

Thanks
Dan