Compact filament transport system for MMU2

thingiverse

If you have an i3mk3 with mmu2 and lack space, this compact setup might suit your needs. The filament cage, originally designed before Prusa's release of mmu2s, sits atop the printer, at the perfect level to print full-size objects. This cage has been proven effective with all filaments, including ColorFABB's brass fill, as shown in a comment. To ease back strain during filament insertion, the cage can be released while inserting the filament. An added insertion tool makes the process quick and easy. For flexible materials, an extra cover ensures the path is followed correctly. The filament spools are arranged compactly, utilizing Prusa's original ball bearings and metal rod without taking up unnecessary space. To set this up, you'll need about a meter of 3mm PTFE tube. The reasons for using 3mm tubes include: * Easier to drag the tips through the tubes * Less tube length means faster load times * ColorFABB's brass fill cannot be printed with 1.75mm tubes unless you're exceptionally lucky However, if you'd like a different tube dimension, simply edit column B in the Freecad document spreadsheet and it's done. Note: Brass-filled filaments can break easily. To avoid this, set up a straight path from the filament PTFE connector to the spool with no bends or obstacles. Adjust the MMU2 and idler for low pressure, and set all load speeds under Filament->Advanced in Slic3r to 3mm/s, 20s, etc., making sure they're as slow as possible.