Prusa MMU2.2

thingiverse

This is mine corrected version of MMU2 with working cut-off of filament. I tested cut off at PLA, ABS, PETG (make little noise:-) ), Carbon PETG, ESD PLA, HIPS, FLEX (not working). Use cutter is good if you use often printer because PTFE tube inside of extruder is brushed and ball at the end is too big pass to nozzle afterward. Main redesign is done at part which has M2 or M2.1. Model mmu2-front-PTFE-holder(M2)-screw-blinder-4x is used to blind holes in model mmu2-front-PTFE-holder(M2). Time to time happend that shred is blocked in srews hole. Also model mmu2-front-PTFE-holder(M2) print from smaller side on bed - front side. In models are two pulley-body(M2). Fixed mean design as Prusa`s just make hole for shreds. Removable Bowden has capability to easy remove Bowdens from spools side, for example cleaning, change of PTFE tubes, maintenance on the printer. For removeable version is needed five extra 19mm PTFE tubes, five M5 nuts and press conection for tube dia 4mm and M5 thread for example type 153304_QSM-M5-4. For release of cutter in firmware please refer to prusa`s github just uncomment line //#define MMU_HAS_CUTTER in Prusa-Firmware/Firmware/variants/your_printer_variant.h