I am trying to make a simple assembly with a caster wheel, mounting plate and an angle iron for the leg.
I can't figure out how to insert a plane that is tangent with the bottom of the wheel. I inserted the above caster In the assembly as the first part. It shows as fixed, However, it seems to be sitting up above the xy plane. I want to measure from the 'floor' up a certain distance to mate another part, but can't figure out how to create or select the 'floor' plane.