Simple Bed Knob Tightener for Ender 2 Pro

Simple design to keep the knob stationary Without (replacing new springs, loud noise, limited step angle, too hard to turn, required detailed print).

The Ender 2 Pro bed knob itself has low traction surface, and contact directly to the frame, which make it quite easy to rotate.

This design use traction between part's surface to keep the knob in-place, and require some more force to turn it.

This sound like a car/motorbike clutch using to transfer/not transfer the torque (wait, I guess I could create another one like multi-plate clutch, :)) ).

Use with original Ender 2 Pro bed knob.

I tested PLA+ and ePLA matte, which work great to me.