I think I understand what you mean Chip, relative to the rotation axis, tangential pressure by the Belleville washer and radial pressure by a spring plunger.? It seems like part 1 requires the outer block to be in a fixed position by attaching it to the cover, while part 2 requires the outer block to be movable.? I did not quite get that part, a verbal description can do so much.?
Regardless, I'm not ready for placing McMaster-Carr orders.? What I have works, it's non-destructive and I had fun doing it. And I took the sharpest image I ever took, with it BTW.? I could change it to a sheet metal brace that encloses a tangential spring for perpendicular pressure instead of pulling on a screw.
In the end, using the worm cover for spring loading is an afterthought and a kludge.? That worm cover has 4 screws that need to be positioned carefully, and that also serve to protect the motor couplings from being pulled on.? I just spent over an hour getting the RA motors attached and having the the worm positioned such that it moves freely.? The aluminum flexible couplers that I use make the tolerances even tighter.? It is enough trouble by itself let alone adding a loaded spring in the mix.? A good spring loaded worm system should be designed up front and center so it can be installed and adjusted independently of the other parts.
