Rewinder Spring Redux

thingiverse

I use a remix of VincentGroenhuis' Universal Auto-Rewind Spool Holder on my Prusa i3 mk3s MMU2.0 setup as a substitute for the prusa fiber buffer. I have five of these installed, and they consistently rewind fiber onto the spools every time the MMU tool switches to a different fiber for the extruder. The remix replaces both the spring and housing components. After testing the bi-directional spring, I found it too delicate for my setup's long rewind lengths, so I opted for this replacement which only moves in one direction. This orientation ensures that the spring tightens into a smaller bundle as the spool unwinds, making it more durable. I print each part separately using PetG material. The Customizer allows you to adjust the thickness of the spring to apply varying levels of force according to your needs.