Ender 3 MicroSwiss Direct drive extruder kit

thingiverse

Ender 3 direct drive extruder kit ====================== Designed to work with all metal hotend from MicroSwiss and aluminum (aluminium) dual drive extruder. -------------------------------------- **This kit has the following benefits:** + It works with microswiss and aliminum dual gear extruder + It removes the need to run filament through the bowden tube, allows more responsive filament control and prevents all metal hotend gunking up so easily. (2mm retraction causes no stringing) + It removes the airflow from heatsink fan allowing you to control parts cooling more accurately + The stepper and extruder clears the top horizontal bar and doesn't affect the build height at all. + Parts cooling from 2 sides improves consistency. + It can be printed without supports + It can be done for just the cost of the filament (approx 80g). + It has a slot for a mini 24 to 12v converter, which combined with meanwell psu, makes the printer virtually silent. + Extrudercoolingfan.stl can be very easily removed without removing the part cooing fan, just by undoing a single screw that holds it to the ExtruderFanmount.stl for changing nozzles. **And following downsides:** + Plastic is more flexible than aluminum and steel. + PETG will disfigure when it reaches 75c and over. + You will need to cut around 4cm off your bowden tube for this extruder. + You will need to extend your 4 core stepper cable by around 50cm. **Warning** 3d printed direct drive kit requires the stepper motor cable to be extended. How you do this is up to you, but you need approximately 50 centimetres of additional 4 core cable if you want to fit it together with the extruder heating and fan cables. You will need around 4cm piece of bowden tube. If you don't feel comfortable cannibalizing your current tube as reverting to the old extruder would become more difficult, you will need to buy some spare. I recommend slightly enlarging screw holes until the screws drive in without too much force. Added pictures of the ASA reprint for all the parts. Those were wet sanded with 150 grit sandpaper, sprayed with TAMIYA fine surface primer and TAMIYA black spray paint. ASA is not as rigid as PETG though, but it finishes better and smoother. **Assembly instructions in pictures** Cable chain end attachment remix allowing better cable management: https://www.thingiverse.com/thing:4457470 Cable chain thing to print with it: https://www.thingiverse.com/thing:2920060 **Update 1:** All 3 models have been tuned slightly. Extruder.stl has now a flat cable clip for the stepper cable. Extrudtercoolingfan.stl has the air nozzle distance increased from the heater block as i found that the PETG duct had a slightly deformed edge. Extruderfanmount.stl has a small upwards lip added to further direct the heatsink fan airflow away from the print. If you're printing up to 240c, you don't need the extrudercoolingfan.stl upgraded. I started printing ASA at 255 and the PETG part deformed.