Extruder and X-carriage

Printed Parts

Description Count
X-carriage 1
Hot end retainer 1
Drive mount 1
Drive spacer 1
Large helical gear 1
Small helical gear 1
Drive body 1
Drive idler 1

Vitamins

Description Count
M6 nut 2
M4 x 50mm hex head cap screws 4
M4 washers 10
M4 nut 6
M4 x 16mm cap screws 2
M3 washer 4
M3 x 10mm cap screw 4
M3 x 8mm set screw 1
M3 nut 1
M8 nut 2
M8 washer 8
Hobbed bolt 1
M8 nylon lock nut 1
3/8" x 9/32" spring 4
8mm x 25mm drill rod 1
Hot end retainer 1
608zz bearing 3
1/8" ID x 1/4" OD x 630mm PTFE tubing 1
Stepper motor 1
J-head hotend, assembled 1

Assembly - Summary

  1. Prepare printed parts
  2. Assemble extruder drive
  3. Assemble x-carriage

Assembly - Step-by-Step

  1. With a 3mm drill but, ream out the filament path through the extruder drive body and clean up the slots for the motor mounts. Used the 3mm drill bit like a file to ream out the 4mm openings for the idler mounts.
  2. Clean up gears with a sharp knife, removing any protrusions from teeth, flashing from the print-surface-side of the gears and open up the set screw nut trap on the small gear. With a 5mm drill bit, ream the small gear shaft opening. Use a 3mm drill bit to ream the set screw opening in the small gear.
  3. Ream the filament path in the extruder drive spacer and mount with a 3mm drill bit.
  4. Push the hot end retainer into its slot in the x-carriage and use a 3mm drill bit to ream the retainer screw holes. Use a sharp knife to open the retainer nut traps being careful to not remove too much material; remove any obstructions in the Bowden sheath opening.
  5. To facilitate threading the Bowden sheath retainer nut, taper the ends of the PTFE tubing in a pensil sharpener.


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