Planetary Extruder

thingiverse

I designed and printed this after enabling LIN_ADVANCE in marlin. I was finding without the gearing my direct drive extruder that came with my hictop machine would sometimes skip and I would have to run the stepper very hot. With this, I can use a pancake size stepper and still never skip a beat running the motor fairly cool at the same time. I have been using this for awhile now and have noticed a marked improment in the overall smoothness of my prints and stability of the printer. This extruder can act as a bowden extruder. I have included a clip that the motor can snap into which then snaps onto the side of the z carriage of many kit printers. The extruder is threaded and ready to accept a standard 6mm pass through bowden coupling. I prefer a direct drive system myself, in which case, the stainless throat that comes with hictops and many other machines can be screwed directly into the same threaded hole. This provides a very direct route to the hot end great for flexible materials. Please see my other thing for mounting this extruder and the standard hot end parts in a direct drive setup. Changes: 18-03-26 - Replaced regular nuts with nylon lock nuts 18-04-14 - Uploaded changes related to revision 3. See PDF drawing revision 4 for details. Uploaded an STL of the complete assembly 18-08-25 - Uploaded revision 4 of extruder assembly and revision 3 of cover. See drawing revision 5 for details 18-10-29 - Packaged last revision that is backwards compatible with direct drive bracket. Added revision 7 files that have been changed to create a more compact assembly 18-12-19 - Revision 8.2 - MOVED CENTER AXIS OF FILAMENT HOLE CLOSER TO TANGENT WITH FILAMENT GEAR. REQUIRES LESS FORCE ON TENSIONING ARM TO ATTAIN GOOD GRIP ON FILAMENT. NO OTHER PARTS WILL NEED TO BE REPLACED. ADDED EXTRA INFO TO BOM 19-04-16 - REV-8.3 - REMOVED SMALL SPACER WASHERS. CHANGED OTHER PARTS TO INCORPORATE BOSSES TO ACT A BUILT IN WASHERS. UPLOADED A .STEP FILE ASSEMBLY