MMU Filament Buffer from MMU2S parts.

thingiverse

For other Prusa MMU stuff: https://www.thingiverse.com/AbeFM/collections/abes-mmu2-stuff. Included there is a link to cwkoehler's stand for this Thing, listed here as a remix. Thanks Chris! This design utilizes the numerous bearings and axles from the MMU setup, reducing friction and enhancing reliability/serviceability. The main feature is the minimal deflection filament path, which also works well with soft filaments and is drybox compatible. To prevent unruly filament from escaping, I print sides, and I have yet to design a proper foot. I just printed an extra side and use that screwed to my descant box. In use, you can feed stiffer filaments along by pinching and sliding, but most of the time I simply tip back the cap, run filament (I like to go 2 feet past the end of the buffer and drop the filament in to prevent issues with spool momentum unwinding filament on the spool), and then seat one end of the cap on the plastics and tilt it down. It takes a bit of practice but works great once you understand how it operates. This is very much a work in progress! Please let me know what you find. If there is interest, I'll make a proper bottom and post more details on making an end-to-end enclosed filament system. Errata: Wow, I just realized, I haven't even touched my design in months, I should share what I have as it's not going out of style soon. Plus I've got a few downloads on the last version so there's at least some interest. This is a clean-sheet design, but spiritual successor to my envisioned "filament wallet".