K8400 - Dual Extruder upgrade to print flexible filaments NinjaFlex, FilaFlex, ...

thingiverse

Hello, I replicated a job similar to http://www.thingiverse.com/thing:854608, but with a dual-head setup, where one head is direct and the other is bowden. I made no changes to the hot end itself; instead, I modified one of the two hotend plastic parts by drilling a 4mm hole in the top and then using PTFE directly, applying the same principle. I utilized the existing extruder parts but reversed their orientation, positioning them upside down. By employing the wiring from hotend 2 in hotend 1, no adjustments to the Firmware were necessary to reverse the rotation.