Prusa MMU 2.0 filament control

thingiverse

<h3>Prusa MMU 2.0 Filament Control for Lack Enclosure</h3> I needed to control the loading/unloading of filaments for my Prusa Multi-Material 2.0, and it had to be compact and fit below my Ikea Lack enclosure on my desk to be fed by an airtight box. I was inspired by https://www.thingiverse.com/thing:3184377. Filament Control in Action https://youtu.be/2knFnbs0e2s <h3>Materials</h3> <ul> <li>6 x plexi plates 210x297x3 mm</li> <li>4 x screws M3 16 mm (for frame assembly)</li> <li>4 x screws M3 6 mm (for PTFE tube holder assembly)</li> <li>6 x screws M3 12 mm (for PTFE tube holder assembly)</li> <li>14 x screw bolts M3</li> <li>6 x screws M4 20 mm (for assembly with the enclosure)</li> <li>glue gun (for assembly with the enclosure)</li> <li>6 x bearings 608 (I used those from the MMU 2.0)</li> <li>1 x aluminum tube 8x70 mm (I used one from the MMU 2.0 that I cut)</li> <li>2 x steel rods 2 mm (I used steel rod for RC plane)</li> <li>drills</li> </ul> <h3>Box Assembly</h3> <ol> <li>Start to sand holes for screws, bolts, and PTFE tubes with adequate files (flat, round needle) and ensure everything fits.</li> <li>Join the 2 bottom parts with 2 M3 16 mm screws and bolts. Do the same thing with the top parts.</li> <li>Place the 6 plexi plates in the bottom part. Close with the top part.</li> <li>Insert the 2 mm rods into holes to assemble top and bottom parts. If needed, adjust holes with a 3mm drill.</li> <li>Mark the center of bearing axis on the first plexi plate. Remove the plexi plates.</li> <li>Tighten securely the plexi plates together and to your workbench before drilling it. Start with a 3 mm drill and increase step by step up to 10 mm with slight pressure to not crack the plexi plates.</li> <li>Place the plexi plates back in the bottom part. Place bearings in the 5 wheels. Put the wheels at their place. Insert the 8 mm aluminum axis through everything and fix it with 2 plugs.</li> </ol> <h3>Assembly to Enclosure</h3> <ol> <li>With a drill, make a hole in your enclosure to put the filament pass part. Glue it with a glue gun. Keep some space from the border of your enclosure for its wall (see picture).</li> <li>Insert PTFE tubes into the filament pass part and top part. Glue the top part to the enclosure with the glue gun. Place 6 M4 20 mm screws to fix the top to the enclosure.</li> <li>Fix Holder part 1 to the filament pass with 2 M3 6 mm screws. Insert the 5 PTFE tubes from the MMU 2.0 through the filament pass. They should be out of the Top part by a few millimeters. Fix them with Holder parts 2 and 3 M3 12 mm screws.</li> <li>If needed, you can add also a PTFE tube holder to the bottom part of the box.</li> </ol> <h3>Usage</h3> <ol> <li>Remove the box from the enclosure.</li> <li>Insert the 5 filaments through the box and through the PTFE tubes.</li> <li>Loading the filaments with your Prusa.</li> <li>Close the box with the 2 mm rods.</li> </ol> <h3>Additional</h3> My Lack enclosure for MMU 2.0: https://www.thingiverse.com/thing:3296106 My PSU holder and closure mod: https://www.thingiverse.com/thing:3319006