Dry Box - Filament Re-winder for Prusa MMU2

thingiverse

The main objective behind this design is to create a moisture-free storage container for filaments that can be easily selected by Prusa's MMU2 accessory. This design builds upon and modifies two existing files: Parametric Auto-Rewind Spool Holder by VincentGroenhuis and Filament Spool Stand for Rubbermaid Container by MysteryDough. The containers are placed on top of an enclosure, such as the one mentioned below, and feed filament into a PTFE tube that connects to one of the MMU2 input ports. The filament container or Dry Box contains packets of desiccant that absorb any humidity that may enter the container. With the exception of a very short piece of filament within the MMU2 feeder, no part of the filament is exposed to the surrounding atmosphere. The Auto Rewind mechanism is also incorporated into this design, which applies rotational pressure in the opposite direction to unspooling motion. This re-spools the extra filament that is returned to the container upon Prusa i3 MMU2 filament Unload or Eject. Included in the file section is an OpenSCAD file that can be used to generate rewinders of different sizes. As a matter of convenience, a Hub and several Adapters are included in the file section to support most spool sizes. Typical Enclosure: https://www.thingiverse.com/thing:2396990