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Bowden tube is jammed  

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babazaroni
(@babazaroni)
New Member
Bowden tube is jammed

Hello, after many successful prints on Mk3s, I let the filament run out and my bowden tube is now jammed.  The filament is cut off right at the top of the tube.   I preheated and took a dental tool right angle probe and reached in the side port and tried to push the filament down but it did not move.  What should I do next?

Best Answer by cwbullet:

You have two options:

  1. Disassemble and remove the Bowden tube.  You may need a heat gun to remove it.  You can find cheaper ones but I recommend one like that one with an LCD to show the temperature.  Always use pliers to hold the item you are heating.  
  2. Remove the nozzle and push the filament out while heating.  I often disengage the Bondtech gears and use 1.6 mm tungsten welding wire.  I heat the hotend up to 20-30 degrees higher than the printing temperature and use the heat of the hotend to soften the filament.  Gently push it out.  

I hope this helps.  

Posted : 23/08/2020 3:09 am
cwbullet
(@cwbullet)
Illustrious Member
RE: Bowden tube is jammed

You have two options:

  1. Disassemble and remove the Bowden tube.  You may need a heat gun to remove it.  You can find cheaper ones but I recommend one like that one with an LCD to show the temperature.  Always use pliers to hold the item you are heating.  
  2. Remove the nozzle and push the filament out while heating.  I often disengage the Bondtech gears and use 1.6 mm tungsten welding wire.  I heat the hotend up to 20-30 degrees higher than the printing temperature and use the heat of the hotend to soften the filament.  Gently push it out.  

I hope this helps.  

--------------------
Chuck H
3D Printer Review Blog...
Posted : 23/08/2020 11:37 am
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