Modification of the Prusa Filamentbuffer MMU2S

thingiverse

First of all, I'd like to thank the developers of the previous filament buffers for their inspiration. https://www.thingiverse.com/thing:3894874 https://www.thingiverse.com/thing:3606350 As with my predecessors, the main goal is to make changing the filament buffer on the MMU2S as easy as possible. The filaments must be individually accessible from above for changing. I've set the design to use as many parts of the existing buffer as possible, so you don't have to buy any extra components. The PTFE hoses are attached to the "Filament Guide" s by clamping with a screw and nut. I chose this method because the previous principle didn't appeal to me. The screws press directly onto the PTFE tubes, which can cause problems if they apply too much pressure. This can lead to an error message on the MMU2S. To avoid this, the hose is clamped on the entire circumference. The filament buffer can be screwed to the base. The "Connection" keeps the buffer at the correct distance from the printer and stabilizes the structure if you don't want to screw the buffer in place. The hose routing from the drybox to the MMU2S is designed with as few changes in direction as possible, which helps keep the filament from rubbing against the hose. This might require a bit more space, but it's worth it for a more reliable setup. I printed the 5 filament guides from PETG, while the rest of the parts are made of PLA. A raft around the components can provide additional stability. Here is the list of components: 1. Filament Guide (5x) - must be printed 2. Cylinder head screw DIN 912 M3x10 (10x) - included with MMU2S 3. Square nut M3 (10x) - included with MMU2S 4. Separate Plate (6x) - included with MMU2S 5. Support (1x) - must be printed 6. Nut Din 934 M3 (20x) - included with MMU2S 7. Side Support (2x) - must be printed 8. Cylinder head screw Din 912 M3x40 (16x) - included with MMU2S 9. Cylinder head screw Din 912 M3x12 (4x) - included with MMU2S 10. Base (1x) - must be printed 11. Connection (1x) - must be printed