Pro/DESKTOP newbie question: radial constraint possible?

Hello Pro/D experts,

I'm starting to learn Pro/D (Express). In Design mode, I'm stuck with
this problem:

- I draw a circle with say 40 mm diameter
- I draw a smaller circle concentric inside the first one
- now I want to put a dimensional constraint _between_ the two
circles, specifiying a 5 mm "wall thickness"
- this should result in an inner circle that's always 10 mm smaller in
diameter than the larger one...

....how can this be achieved??

Any help and ideas highly appreciated.

Thanks,

Hans

 

Hello David,

thanks a lot for your input. Since the part (a pipe clamp) is a bit
more complicated than I described, the first alternative works
beautifully here.

Thanks again,

Hans