for the Prusa Multiple Materials Unit 2/S filament buffer.
The MMU 2.0 offering by Prusa is a promising new approach to multiple materials but it did have a few glitches to work out.
With the release of MK3S they also announced an update to their MMU2S. In the announcement they said they are sending all of their MMU 2.0 owners a free update. Since they haven't done such a massive update shipment before they warned that it might take a while.
I really wanted to get my hands on the filament buffer and thankfully Prusa updated the MMU2 GitHub recently so I didn't have to wait.
There was an issue with the posted files in the divider plate(s) for the filament buffer. There is s-buffer-plate.dxf in the SCAD directory but no matching STL. It is 260mm x 230mm, too big for a Prusa MK3.
I have a Cube printer but I had to create my own plate because the .dxf wouldn't work properly in FreeCAD or ESTLCam.
I played around with a honeycomb pattern but could see that the filament has a tendency to go through the holes so it is only usable on the top layer.
The filament buffer addresses one of the major issues with the MMU 2.0, dealing with all the retracted filament. When I read the announcement and I was jazzed.
Once I had the buffer in hand I figured out that I could hang the reels flat to the wall on pegs. I just had to figure out a way to mount the filament buffer to the wall. That moved the 5 rolls of filament off of the desk and allowed the the printer to sit much closer to the wall.
I wanted the the mount to allow full access to the filament buffer and there isn't any real forces being applied to the buffer so I just latch it lightly in place.
I wanted to hang the reels flat to the wall and found Simple Wall Mount Spool Holder
I printed 3 x 75mm, 1 x 85mm,
and the remixed version Simple Wall Mount Spool Holder for Stupid 30mm Filament Reel Holes with the smaller peg because I do have some odd sized reels. NOTE: I had to let Slic3R PE 'fix' the re-mix before printing.
All of the mounts work with the standard spools and having the 85 and small peg should cover the instances I use one of them.
See the filament buffer in action in this short video
Silver and Black Carbon Fiber enforced