Yet Another Prusa Mendel Z Coupling
by nophead, published
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I designed a bearing assembly that mounts to the motors screws and uses a bearing to support the load of the carriage weight and take that load off the coupler and the motors bearings. As designed, it works for motors on top, but you could flip the bearing caddy and lock a couple of nuts on the rod to sit on the bearing. Might work well in concert with your couplers.
I used 3 layers of heat-shrink that I had available, to an OD of 7.25mm.
Wobble is gone.
This part was my first 3D print because when building my prusa I put too much presure in the standard coupler. I wish I have seen this part here before because when the part finished printing and tested on the motor shaft it was compleately loose :'(. My solution at 2am was to sand the parts so it will fit but latter I put a little piece of cardboard to hold the motor. It is working but tonight I will try to print it again and use the tubing.
Thank you nophead :-D
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