Ender 3 Pro Direct Drive Extruder Mount

thingiverse

This is a Ender 3 Pro Direct Drive Mount, that can be used to convert the bowden extruder to a direct drive extruder (e.g. to print TPU filament or to prevent stuck filament due to long bowden tube). Additional parts needed: - Stepper motor cable extention, 500mm - Some PTFE tube to connect the extruder output to the hotend - optional: Aluminium extruder (more pressure on filament transport gear) You can see from the pictures, how to mount this part. To mount the PTFE tube, - cut some tube with appropriate length (better start with a little bit too long tube, as it can be cut a little bit to find the right length) - screw in the tube mount nut to the hotend (stop approximate 1-2 turns before the end) - insert the tube to the hotend part and push it all the way down - tighen the hotend tube nut (do not use to much force) - attach the extruder tube nut to the extruder - push the tube inside the extruder, while attaching the extruder to the stepper motor Use this modification at your own risk. Update to version 2.1: - Added support on rear side to increase rigidity during filament retracts Update to version 3: - Added modified design to adapt 3Dman dual gear extruder (might work with others, too). In my case, I was unsatisfied with the filament guide for TPU with the single geared extruder. So I decided to replace it with a dual gear extruder. This extruder needs little big longer PTFE tube (approx. 8 cm) than the single gear extruder. Remember to update the E-Steps in Marlin according the gear