[FEATURE REQUEST] MMU3 pulley motor rotation control

[BID3D]

Printer model

MMU3

Describe the feature

Add a feature to allow user to control MMU pulley motor rotation.

Expected functionality

Feature would be enabled such that MMU3 pulley motor could be rotated under user control. The feature would allow user to rotate the MMU3 motor pulley such that each of the grub screws can be readily accessed for tightening. Currently there is no direct control for this pulley motor other than the load filament to MMU3. The user needs a manual method to precisely control the rotation of the MMU3 motor pulley to affect maintenance of the pulleys and their grub screws.

Expected functionality

User can access this new feature via control panel to allow rotation of MMU3 pulley motor. User would be able to rotate control knob on printer to control the rotation of the MMU3 motor pulley shaft. User can manually control the motor pulley shaft rotation.