This is the easiest of the three fixes but does make the nozzle installation permanent. If you do not plan to ever change nozzle sizes this is the way to go.
Required Tools
  • PTFE tape, also known as plumbers tape
  • 2.5mm hex key (included with your 3D Printer starter package tool kit)
  • 3mm hex key (included with your 3D Printer starter package tool kit)
  • 13mm Wrench (included with your 3D Printer starter package tool kit)
  • 18mm Wrench (included with your 3D Printer starter package tool kit)
  • Heat resistant cloth/leather gloves
  • Pliers
Procedure

Attempting to remove the nozzle when cold can potentially damage the threads. Once the hot end has reached 160C you can proceed with the instructions below.

Take extreme caution when handling the hot end when at high temperatures; when at 160C the hot end can cause severe burns. Use a pair of pliers or thick leather gloves when handling the hot end when at extrusion/melt temperatures.

If your hot end has not been used this fix can be done with the hot end at room temperature. Any instructions below stating to heat the hot end, can be ignored when starting with a fresh Budaschnozzle 2.0.

Refer to the instructions found here: to remove the hot end: TAZ: Removing the X Carriage Extruder Plate, Extruder and Hot End

The hot end needs to be heated to allow the PLA in the threads to release. Temporarily connect the hot end to the hot end connector on the printer wiring harness.

Connect the printer to the host computer, plug in the 3D printer and turn on. In Pronterface set the hot end temperature to 160C and allow to come to temperature. Once at 160C power down the 3D printer, disconnect from the host computer and disconnect the hot end from the wiring harness.

Use the 18mm wrench to hold the heater block in place away from the heater resistor wire and the thermistor wires.

Use the 13mm wrench to loosen the nozzle.

To clean the threaded extension threads, while the hot end is still hot and the printer turned off wipe the threads clean of any residual PLA. If the PLA has cooled and is unable to be wiped, turn off the printer, reconnect the hot end and bring the hot end back up to 160C. While the threaded extension is still hot and with hot end and the printer turned off use a paper towel to clean off any melted PLA still left on the threaded extension. If the PLA has already cooled, a dental pick can be used to chip off the PLA. Once the nozzle is removed you can clean the PLA from the nozzle by wiping while hot or soaking the nozzle in a hot water bath and brushing the PLA away.

Carefully wipe the hot end threads and wrap one layer of the PTFE tape around the lower portion of the threaded extension.

Gently partially thread the nozzle onto the extension.

Temporarily connect the hot end to the hot end connector on the printer wiring harness. Connect the printer to the host computer, plug in the 3D printer and turn on.

In Pronterface set the hot end temperature to 160C and allow to come to temperature. Once at 160C power down the 3D printer, disconnect from the host computer and disconnect the hot end from the wiring harness.

Finish threading the nozzle.

When reinstalling the hot end, use the length of filament in the extruder to align the hot end filament path to the extruder filament path. You can open the extruder idler to allow the filament to enter and pass by the hobbed bolt. Once you have verified that the entire filament path is aligned and smooth you can secure the extruder/hot end assembly to the extruder mounting plate.

Reinstall the extruder mounting plate onto the X axis carriage, then reconnect to the wiring harness.

If you have any further questions or would like assistance please contact us at Support@LulzBot.com. Please include your order number, name, order date and as much information as possible.