Unclogging procedure for Lulzbot Hexagon Hot Ends (LulzBot Mini and LulzBot TAZ5+)
If there is no filament flow at all:
- If you have been using PLA or PLA-based materials, you shouldn't set the temperature past 230°C. Do not let PLA sit at high temperatures near 230°C for extended periods of time. If you have been using other filaments you can set the temperature higher up to 290°C. Turn temperature up to 230°C if using PLA-based filament, or 290°C for other materials and allow nozzle to reach temperature.
- Open extruder idler.
- Pull Filament out of the extruder.
- Trim off end of filament.
- Push filament back down into the extruder and see if you can get any filament out. You can push fairly hard against the extruder to get this to work.
- Pull filament back out, see if there is anything stuck to the filament and trim off again.
- Repeat process several times to see if you can get nozzle flowing again.
If there is flow but it seems partially blocked, thin, or is “pig-tailing” out of the nozzle:
- Using either HIPS or PLA turn your nozzle to the proper temperature for that material.
- Once up to temperature, extrude several mm of filament.
- Turn your temperature down, for HIPS use 140°C, for PLA use 100°C.
- Once the temperature is reached, open the extruder idler and pull out the filament.
- You should have a perfect mold of the inside of the hot end. The end of the filament should taper to a cylinder that is the size of your nozzle and have a nozzle sized cylinder that is about 1mm long.
- Check for foreign particles or gaps in your mold of the nozzle.
- Repeat steps as necessary to clean out nozzle.