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 the filaments for my Prusa Multi-Material 2.0. And it should be compact and bellow my Ikea lack enclosure laying on my desk to be fed by a airtight box. I have been inspired by https://www.thingiverse.com/thing:3184377 Filament Control in action https://youtu.be/2knFnbs0e2s <h3>Material</h3> <ul> <li>6 x plexi plate 210x297x3 mm</li> <li>4 x screws M3 16 mm (for the 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 scare bolts M3</li> <li>6 x screw 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 aluminium tube 8x70 mm (I used one from the MMU 2.0 that I cut)</li> <li>2 x sleel rods 2 mm (I used steel rod for RC plane)</li> <li>drills</li> </ul> <h3>Box Assembly</h3> <ol> <li>Start to sand the holes for screws, bolts and PTFE tubes with adequate files (flat, round needle) and make sure that everything fits.</li> <li>Joins the 2 bottom part with 2 M3 16 mm screws and bolts. Do the same thing with the top parts</li> <li>Put the 6 plexi plates in the bottom part. Close with the top part</li> <li>Put the 2 mm rods in the holes to assemble top and bottom parts. If needed, adjust the holes with a 3mm drill <li>Mark the centre of the 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 a slight pressure to not crack the plexi plates.</li> <li>Put the plexi plates back in the bottom part. Put the bearings in the 5 wheels. Put the wheels at there place. Put the 8 mm aluminium axis through everything and fix it with 2 plugs.</li> </ol> <h3>Assembly to the 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 place from the border of your enclosure for it wall (see picture)</li> <li>Put PTFE tubes in the filament pass part and in the top part. Glue the top part to the enclosure with the glue gun. Put the 6 M4 20 mm screws to fix the top to the enclosure</li> <li>Fix the Holder part 1 to the filament pass with 2 M3 6 mm screws. Put the 5 PTFE tubes from the MMU 2.0 through the filament pass. The should be out of the Top part from few mm. Fix them with the Holder part 2 and 3 M3 12 mm screws</li> <li>if needed, you can add also a PTFE tubes holder to the bottom part of the box</li> </ol> <h3>Usage</h3> <ol> <li>Remove the box from the enclosure</li> <li>Put the 5 filaments though the box and through the PTFE tubes</li> <li>Load 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