Buckrap Hot End Bow

Buckrap Hot End

Release status: working

Description	Buckrap Hot End
License	GPL
Author	User:Buckrap team
Contributors
Based-on	Sui Generis
Categories	Hot End, Bowden Extruders
CAD Models
External Link

Buckrap's Hot End

Here is a simple design Hot End.

Parts

Total costs under EUR15 / US$20:

• PTFE Tube 6mm (external diameter) 30-50 cm
• Brass nozzle 0.5mm extruder and M6 (purchased @ Camiel)
• M6 nut
• M6 brass coupling tube (photo)
• Nicrome wire
• Thermistor
• Perforated assembly strap 6mm holes (in the lower-right corner of the parts picture)
• Kapton tape 5mm (and optionally 10mm)
• Crimp on terminals 1mm
• Wire

Tools

• Pliers
• Wirecutter
• Crimping tool for terminals
• Scissors
• Spanner 10mm for M6 nut
• Multimeter

Step 1

• First push the M6 nut on PTFE tube and use the spanner turn it about 2 cm along tube. Then turn back the nut and remove it.
• Turn the tube into to coupling
• Turn the brass nozzle into the coupling

Step 2

• Tape the coupling and the brass nozzle with the Kapton tape
• Wind the Nicrome wire (Length about 28cm and check for about 6Ohm resistance)
• Tape over the Nicrome wires to hold in place

Step 3

• Insulate the thermistor leads with Kapton tape

Step 4

Take attention here

• Strip insulation from 2 wires for 7cm
• Strip insulation from 2 wires for 4cm
• Crimp the long ends to the Nicrome heater wire
• Cimp the short ends the termistor leads
• Insulate all wires individually with more Kapton tape

Step 5

• Tape the wires together and then tape them to the coupling
• Isulate the top of the coupling (thermal insulation)

Step 6

• Use perforated assembly strap for mounting there are no forces to contend with but it must not vibrate (Makerbot platform illustrated here)