Building a second 3D-printer - arms, hot end and extruder

I have created and mounted the arms, the hot end and the extruder motor.

Printer after mounting the arms, hotend and extruder motor

The arms

Six arms are needed. The arms consist of carbon tubes and tie rod ends on both sides.

Tie rod ends and carbon tubes

Rod inserted on both ends during curing of the glue to make sure all arms have the same length

I have used Bison two component epoxy glue to glue the parts together. It is important that all arms are exactly the same length. That is why I inserted a rod during curing the of glue on both ends.

Parts for the arms:

• Tie Rod Carbon Tube 3*6mm L300
• Tie Rod Ends for Kossel
• End Effector for Kossel
• Two component epoxy glue
• Extra rods to keep the arms at the same length during curing of the glue

The end effector is the part in the middle, on which the hot end will be mounted.

Hot end

Parts for the hotend

I have chosen a 1.75 mm E3D-v6 bowden hot end with vulcano heater block and 0.4 mm (for precision) and 0.8 mm (for speed) nozzles. With 24 volt fan and heater cartridge. I followed these assembly instructions: E3D-v6 Assembly.

Parts for the hot end:

• 8x PTFE tubing, 2inner/4outer diameter (10cm)
• E3D Embedded bowden coupling
• E3D v6 - Heatsink 1.75mm
• E3D v6 - Heatbreak - 1.75mm
• E3D v6 - Volcano Heater block and fixings
• Ceramic Heater Cartridge 24V/40W
• Fibreglass Sleeving incl Thermistor
• E3D v6 - Injection Moulded Fan Duct
• Axial Fan 40x40x10mm 24V
• E3D v6 - Volcano nozzle - 1.75mm x 0.40mm
• E3D v6 - Volcano nozzle - 1.75mm x 0.80mm

Extruder motor

Extruder motor mounted to the frame

I designed and printed a part to mount the extruder motor to the printer frame. This extruder motor has a gearbox for extra power. The bowden extruder head is attached on top of the gearbox.

Parts for the extuder motor:

• Flange Gearhead 5:1 Nema17 Stepper
• Bowden Extruder Head for Kossel
• RobotDigg Filament Drive Gear (8 mm)
• 2020 geared extruder motor mount