Universal Auto-Rewind Spool Holder
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PLA from £6 inc. UK delivery on letter-sized prints. We slice, print on a calibrated Creality K2 / Bambu A1, QC and post.
Filament load/unload issues? MMU2 taking too much space? Not with this Universal Auto-Rewind spool holder! It keeps filament on the spool during unloading, up to four full revolutions. [Video compilation](https://youtu.be/03iUbhrU8xw)
This is a remake of the Original and Parametric Auto-Rewind Spool Holder, but with significant enhancements:
* Slipping point of the clutch can be adjusted in about 15 steps using the dial.
* One size fits almost all spools up to 1kg. Inner diameter 30-75 mm, max outer diameter 200 mm, max width 88 mm. Hubs for wider spools can be created with the customizer, same for hubs with narrow diameters. Stand for 3kg spools available [here](https://www.thingiverse.com/thing:3369189).
* Spring (v1 and v1.01) works both ways around: towards the axle and towards the outer rim. Note: flipping the direction requires re-calibration of the clutch tension!
* Spring v1.02+ and 3.x are direction independent, can be flipped around without changes in clutch tension. These versions might also be better protected against spring overloading.
* If the clutch slips too much then you can put ducttape or electrical tape on the outer rim of the spring, this slows down the slipping action.
Spring should be printed with 0.2 mm layer thickness to match the gaps in the structures (see assembly instructions). All other parts can be printed in any layer thickness, 0.2 mm is default.
GCode for Prusa i3 MK2/S and MK3(S) /MM(S) can be downloaded here: [single…
