Flexion Extruder for Prusa i3 MK3 - E3Dv6 or Volcano

02/15/2022 UPDATE: Several fixes and refinements have been made, please use the files ending in LATEST for the newest models.

Looking for the original CAD files? Unfortunately, I designed this back when I was primarily still using TinkerCAD. As such, there are no CAD files, but the TinkerCad design is public and can be found here.

• Works with stock firmware, but you'll need to change your steps per mm using M92 E<steps>. I've found M92 E192 works well for me. This will not persist across printer resets unless you also write it to the EEPROM with M500. Send these via pronterface over usb.

• You'll probably need to cut new PTFE tubes yourself and put a 45 degree taper on the part that rests in the hotend. I just use sand paper and a eyeball it and twist it as I slide it. Length is roughly 51mm, but I need to check that. Good luck :).

• Assembly is very similar to the stock extruder, but simpler.

• If the teflon tube is correct (which is critical) and cam properly adjusted, this was able to print ninja flex at maximum speed. I was trying to see how fast it would start failing, but the MK3's ability to plan stepper movements failed first, and the motion began to stutter. This was using a volcano. If you want to print shore 85A filament like a TPU squirting demon, this'll do ya. ;)

• Will only ever support MMU for filaments that do not require changing the cam setting for tensioning. This may be added in the future, but for now, no MMU support.