Prusa Multi Material Wall Mount and Filament Guide

thingiverse

Spool wall mounting solution for Original Prusa i3 MK2 Multi Material Upgrade. The MMU design has the filament path coming into the extruders from below which is quite awkward. There are alternative extruder mounts that address this but I wanted to keep mine stock so I designed this solution. It uses very cheap (about $3) curtain rod holders from IKEA to hold the spools on the wall and then adds a filament guide further down on the wall to take in the filament from above and feed it upward to the printer on a similar angle to the included holders (but higher). The filament guides also add enough resistance to stop the filament unwinding back onto the spools but not so much as to create extrusion problems. While the original MMU spool holder includes PTFE segments as well it does not seem to be as effective at this. You can of course take as much or as little of this Thing as you need. There are many possible mounting solutions this is simply one that has worked well for me. BOM - 5 x [IKEA BETYDLIG Curtain Rod Holder](http://www.ikea.com/au/en/catalog/products/70219892/) - 8 x M3x10mm Cap Head Screw - 8 x M3 Square Nut - 1 x 1m PTFE Tube - 4 x Wall Screws - 1 x 1m M8 Threaded Rod - 16 x M8 Nut - 16 x 608 Bearing Printed Parts - 5 x Betydlig_rod_holder.stl - 8 x Spool_hub_608.stl - 1 x MMU_wall_bracket.stl - 4 x MMU_filament_guide.stl Any suitable curtain rod holder would of course be ok to use but might require different printed parts to adapt. Note that the BETYDLIG should be mounted with the short part on the wall and the long part on sticking out for the spool. The plastic cover provided with the BETYDLIG needs to be cut down, there is a guide mark on the plastic for that. When sourcing PTFE, if using sources such as Gearbest, Aliexpress or Bangood I would suggest ordering multiple sets from different sources as quality varies widely. Of course, if you want even more overkill than this Thing is already you could use [Capricorn](https://www.captubes.com/). The included spool hubs are nothing special, just designed to fit the spools I am using (eSUN) without much overspill, there are many great alternatives on Thingiverse to choose from. Anything that sits on M8 rods should work with this Thing. See below for printing and assembly instructions. **UPDATES** _18th December 2018_ - Added 5 bracket MMU2 version. Uses the same guides so if you already printed just need one more. Mounting hole position unfortunately had to change for the wall screws though. Just fits on the Prusa bed if you rotate 332 degrees and do not print a skirt.