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How to Unclog a Prusa i3 MK3 Nozzle

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  1. How to Unclog a Prusa i3 MK3 Nozzle, How to Unclog a Prusa i3 MK3 Nozzle: étape 1, image 1 de 3 How to Unclog a Prusa i3 MK3 Nozzle, How to Unclog a Prusa i3 MK3 Nozzle: étape 1, image 2 de 3 How to Unclog a Prusa i3 MK3 Nozzle, How to Unclog a Prusa i3 MK3 Nozzle: étape 1, image 3 de 3
    • Set the nozzle temperature to your filament's recommended printing point.

    • While the printer is heating, gently tug the filament and pull it out.

  2. How to Unclog a Prusa i3 MK3 Nozzle: étape 2, image 1 de 3 How to Unclog a Prusa i3 MK3 Nozzle: étape 2, image 2 de 3 How to Unclog a Prusa i3 MK3 Nozzle: étape 2, image 3 de 3
    • Remove the top right M3x14 heatsink fan screw.

    • Remove the bottom right M3x20 heatsink fan screw.

    • Loosen but do not remove the M3x14 screws located under the extruder motor.

    • Loosen but do not remove the M3x14 screws located at the top behind the extruder feeder.

  3. How to Unclog a Prusa i3 MK3 Nozzle: étape 3, image 1 de 3 How to Unclog a Prusa i3 MK3 Nozzle: étape 3, image 2 de 3 How to Unclog a Prusa i3 MK3 Nozzle: étape 3, image 3 de 3
    • Ensure that the extruder motor cable has enough slack to be pulled apart.

    • With the heatsink fan screws removed, gently pull apart the extruder encasing.

  4. How to Unclog a Prusa i3 MK3 Nozzle: étape 4, image 1 de 2 How to Unclog a Prusa i3 MK3 Nozzle: étape 4, image 2 de 2
    • When the hotend is cool to the touch, gently remove it from its encasing.

  5. How to Unclog a Prusa i3 MK3 Nozzle: étape 5, image 1 de 3 How to Unclog a Prusa i3 MK3 Nozzle: étape 5, image 2 de 3 How to Unclog a Prusa i3 MK3 Nozzle: étape 5, image 3 de 3
    • Be careful with the cables attached to the hotend; too much stress on them can rip them off.

    • Unscrew and remove the heatsink from the hotend.

  6. How to Unclog a Prusa i3 MK3 Nozzle: étape 6, image 1 de 3 How to Unclog a Prusa i3 MK3 Nozzle: étape 6, image 2 de 3 How to Unclog a Prusa i3 MK3 Nozzle: étape 6, image 3 de 3
    • Heat up the nozzle to 285 degrees Celsius. The heat will cause the block to expand and allow you to safely remove the parts.

    • While gripping the block, unscrew the nozzle.

  7. How to Unclog a Prusa i3 MK3 Nozzle: étape 7, image 1 de 2 How to Unclog a Prusa i3 MK3 Nozzle: étape 7, image 2 de 2
    • Watch out for the brush being used to clean the nozzle; if the metal of the brush is harder than the nozzle then it will damage the nozzle.

    • A brass brush is being used on the copper nozzle here so that no damage is caused. A brass brush will work fine for most nozzles but research your nozzle's metal to ensure that no damage is done to it.

    • Clean the nozzle with a metal brush.

  8. How to Unclog a Prusa i3 MK3 Nozzle: étape 8, image 1 de 3 How to Unclog a Prusa i3 MK3 Nozzle: étape 8, image 2 de 3 How to Unclog a Prusa i3 MK3 Nozzle: étape 8, image 3 de 3
    • Grip the heatblock with the wrench.

    • Gently unscrew the heatsink thread.

    • Clean the heatsink thread with the brush.

  9. How to Unclog a Prusa i3 MK3 Nozzle: étape 9, image 1 de 2 How to Unclog a Prusa i3 MK3 Nozzle: étape 9, image 2 de 2
    • Clean the heatblock with the wirebrush.

  10. How to Unclog a Prusa i3 MK3 Nozzle: étape 10, image 1 de 3 How to Unclog a Prusa i3 MK3 Nozzle: étape 10, image 2 de 3 How to Unclog a Prusa i3 MK3 Nozzle: étape 10, image 3 de 3
    • Heat the nozzle's temperature to 285 degrees Celsius for the heatblock to expand and grip it with a wrench.

    • Gently reattach the heatsink thread with your pliers, leaving some slack so that it is not flush with the heatblock.

    • Re-screw the cleaned nozzle but leave a gap between the nozzle and heatblock.

    • Screw the heatsink thread until it is flush with the heatblock.

    • Tighten the nozzle once again until you feel the that the nozzle's thread is touching the heatsink thread to ensure that filament does not build up in the heatblock threads.

  11. How to Unclog a Prusa i3 MK3 Nozzle: étape 11, image 1 de 3 How to Unclog a Prusa i3 MK3 Nozzle: étape 11, image 2 de 3 How to Unclog a Prusa i3 MK3 Nozzle: étape 11, image 3 de 3
    • Re-screw the heatsink to the thread.

    • Insert the hotend back in its encasing.

  12. How to Unclog a Prusa i3 MK3 Nozzle: étape 12, image 1 de 2 How to Unclog a Prusa i3 MK3 Nozzle: étape 12, image 2 de 2
    • Re-screw the M3x14 screws.

    • Re-screw the M3x20 screw.

    • Your printer nozzle has now been properly cleaned and re-assembled!

Conclusion

Your extruder’s burning ooze problem has now been fixed, so you can now continue with your prints! Before you do, please remember to re-calibrate your printer.

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Kanlong Yang

Membre depuis le 01/27/21

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York University, Team S16-G9, Turner Winter 2021 Membre de l'équipe York University, Team S16-G9, Turner Winter 2021

YORK-TURNER-W21S16G9

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