FreeRoll spool holder

thingiverse

A space-saving filament guide system for use with the Prusa MMU2. This innovative design minimizes drag on the filament, resulting in a smoother printing experience. As the spool empties, drag remains remarkably low, reducing the likelihood of tangles and jams. The filament guide arm is cleverly counter-weighted to function as a retracting mechanism, effortlessly lifting the filament away from the hotend when it's unloaded. This feature keeps looped filament organized, neatly clearing the bed and cables from potential entanglements. To build this efficient system, you'll need some essential parts: * 608 bearings: three per holder (you can repurpose the Prusa-provided ones for their own holders) * A 3mm x10 screw: one per holder * A 5mm x 10 screw: one per holder * A 5/16"-18 x 5" carriage bolt: one per holder * Two 5/16-18 nuts per holder * Seven 1/4" x 1-1/4" (5mm) fender washers per holder * A 4" length of 1/2" EMT conduit: two per holder * A PTFE tube: one per holder (utilize the existing tubes provided with the Prusa kit)