Load and Unload Filament

Owned by Bobc
Last updated: Aug 31, 2023 by CaseyHWong
4 min read

If you’re swapping between materials, please follow Swapping Between Filament Types

Loading Filament Cartridge

  1. Turn knob quarter-turn counter-clockwise and lift lid.

  2. Load fresh desiccant if needed

    Desiccant can be loaded in the front tray.

  3. Load filament spool between rollers.

  4. Find loose end of filament and feed into PTFE tube fitting at the top

    Filament is fed through the fitting at the top.

  5. Close lid and turn knob quarter-turn clockwise.

Monitor the filament cartridge humidity using the hygrometer. If it displays greater than 15% relative humidity after stabilizing for a few hours be sure the replace the desiccant.

Loading Printhead

  1. Preheat hot end using front display, select the appropriate filament temperature.

  2. Insert PTFE tube into filament feed on HS3 right panel near upper rear corner.

  3. Open HS3 lid to access printhead filament elbow, lift out of bearing holder and set aside.

  4. Disconnect PTFE tube from filament cartridge if connected. Feed filament through PTFE tubing by hand until filament appears at the end of the elbow.

  5. Reconnect PTFE tube to filament cartridge.

  6. Fully insert filament into printhead until the end of travel.

  7. If you are loading a different material than previously printed, complete these instructions before proceeding to the next step:
    Swapping Between Filament Types
    If you are loading the same type of material or this is a brand new Hotend proceed to the next step.

  8. When the nozzle is hot, select the load filament macro on the display. The printhead should now pull filament into the extruder. If you do not see any filament movement, manually feed the filament until you feel the extruder rollers grip.

  9. Check to see material has been extruded at the nozzle. If no material is seen reselect the load filament macro again. Remove any extruded material and clean the nozzle. Persistent oozing is normal.

  10. Reinsert the filament elbow. The printhead is now loaded and ready to print. Cooldown the printhead if you are not starting a print immediately.

Avoid leaving the nozzle preheated for long durations as it burns the filament inside which may lead to clogs.

Unloading Printhead

  1. Preheat hot end using front display, select the appropriate filament temperature.

  2. Open HS3 lid to access printhead filament elbow, lift out of bearing holder and set aside.

  3. When the nozzle is hot, select the unload filament macro on the display. Grip the filament and apply upwards pressure until the printhead releases the filament.

  4. Cooldown the printhead if you are not loading new filament immediately. The printhead is now unloaded.

Unloading Filament Cartridge

  1. Turn knob quarter-turn counter-clockwise and lift lid.

  2. Loosely grip filament at bottom of PTFE tube fitting with left hand, and reel in the spool with your right hand. Watch for the end of the filament to avoid tangling in the spool.

  3. Secure the filament with tape or in the holes at the rim of the spool.

  4. Pull the spool ejection tab at the bottom left with your left hand, and grab the spool with your right hand.

  5. The filament cartridge is now unloaded. If not loading a new spool immediately, reset the spool ejection tab and immediately close the lid to prevent the desiccant from saturating.

 

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