A simple set of parts to add the titan geared extruder to the Ender 3. I designed this around the triangle labs "titan" extruder (using the bowden tube adapter without the locking clip) with pancake stepper. The only mandatory modifications from the stock setup are increasing the steps/mm (mine is 398) and changing the routing of the wires. No build area is lost X,Y, or Z.
I do have linear advance enable and was able to lower print jerk to maintain quality. Overall print quality has increased, filament changes are much easier, and filament is kept away from the z lead screw.
Only one M3x10mm screw is needed.
Also included are mounts to use johnniewhiskey's cable chain.
And an option for adding a servo for auto bed leveling.
For the micro switch servo arm use: http://www.thingiverse.com/thing:3293821 on SG90 type servos or https://www.thingiverse.com/thing:3731273 for HS65 servos (as pictured).
.12 for fitting, .2 for all other parts
Fitting is printed with .12 layer height and no supports. The Front mount and z side mount are printed with supports and .2 mm layer height. The rear mount and x carriage mount are printed with .2 mm layer height and no supports.
Bowden tube, Bowden tube fitting from hotend, stock extruder/E stepper, top M3 screw from fan shroud and the two top M5 bolts on the x carriage.
Screw in the printed fitting into hotend. Place M5 bolts in the front mount and install on the x carriage. Screw in M3x10 bolt into fan shroud (If using the stock M3 screw just enlarge the hole in the front mount to accommodate the screw head). Inset the roller spacers into the rear mount holes and place rear assembly on the two M5 bolts, then install rollers and nuts. Insert cut section of bowden tube (see below) into the hotend place extruder onto mount and secure with the lower right hand bolt. Install pancake stepper motor and fasten with remaining 3 bolts.
Cutting the bowden tube section:
To get the proper length of tube cut first unscrew the nozzle about 3/4 of a turn and fully seat a section of ptfe tube. Cut the tube to length so the extruder will sit flush on the front mount with the ptfe tube against the back of the loosened nozzle and fully inserted into the titan extruder. The ptfe tube will have an interference fit with the back end of the nozzle once fully assembled. My tube length came out to be 90.5 mm.
Make sure all screws and the nozzle are snug. Route the hotend wires around the exterior of the left hand Z vertical extrusion. zip tie in place and calibrate E steps/mm.
IMPORTANT: Having the wires in the stock location between the two vertical extrusions can cause binding of the wires when the x carriage is close to the vertical extrusions or at max z height.