Parametric Auto-Rewind Spool Holder
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Newer design available: [Universal Auto-Rewind Spool Holder](https://www.thingiverse.com/thing:3338467)!
Filament load/unload issues? MMU2 taking too much space? Not with this Parametric Auto-Rewind spool holder! It keeps filament on the spool during unloading, up to eight full revolutions.
This is a remake of the original [Auto-Rewind Spool Holder](https://www.thingiverse.com/thing:3200204), but with significant enhancements:
- Fully parametric
- Default spring size 100mm gives up to eight rewinding revolutions
- Metal bearings can be used, but also works fine without any bearings
- No tape or zip-ties needed
- Compatible with existing spool stands with 8mm axle slots
- Spring blades in the hub keep the spool pressed against the backplate for adequate friction and prevention of spool sliding off the hub
- Adapter allows to mount differently-sized spools on the same hub
- Spacers included to keep hub in place
- Spring guard included
How it works:
- Enter your spool's inner diameter and width in the parameters for reference spool (you can do that in the Customizer app, link is on this page, or download OpenSCAD yourself). If this is your only spool size: set the second spool inner diameter to 0 so that no adapter is generated. In assembly view (output to "assembly") you can verify the arrangement if desired. Set output to "print" and export as STL. If slicing fails then [fix the STL](https://service.netfabb.com/service.php). Print the thing with your…
