replacing the ptfe tubing  

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michael.r91
(@michael-r91)
New Member

so long story short, i have filament jammed below the extruder gears in the ptfe tubing.  the tubing is also showing signs of wear on the top end.  i have the normal white ptfe tubing and some capicorn tubing.  is there any reason not to use the capicorn tubing?

 

thanks

Posted : 08/06/2019 8:28 pm
bobstro
(@bobstro)
Illustrious Member

There is nothing wrong with replacing the PTFE and Capricorn is, by all accounts, good stuff. I haven't done this myself.

However, before you go tearing stuff apart, if you just want to get going again, try this:

  1. Raise Z to max.
  2. Open the extruder door.
  3. Heat up to 285C.
  4. Use a 15cm X 1.5mm rod (as sold in hobby shop) with polished ends (to avoid tearing up the PTFE) inserted through the filament feed, past the (open) Bondtech gear and into the top of the PTFE tube. Press down on the stuck filament. A 1.5mm hex wrench can be used in a pinch, but won't as much length to work with.

With any luck, you'll be able to push it down far enough that it'll melt out and you can insert fresh filament to continue on. Another variation is to remove the nozzle, clean out any accumulated gunk (I use braided wire as a wick) and press from below to pop the stuck filament up high enough that you can extract it from the top of the PTFE tube using needle-nose pliers or tweezers.

 

My notes and disclaimers on 3D printing and miscellaneous other tech projects
He is intelligent, but not experienced. His pattern indicates two dimensional thinking. -- Spock in Star Trek: The Wrath of Khan...
Posted : 08/06/2019 8:40 pm
michael.r91
(@michael-r91)
New Member

thanks, i had tried that, but the filament will not budge.

 

 

Posted : 08/06/2019 8:56 pm
bobstro
(@bobstro)
Illustrious Member
Posted by: michael.r91

thanks, i had tried that, but the filament will not budge.

Even if pushed from below? Bummer, but it was worth a shot. Good luck with it.

My notes and disclaimers on 3D printing and miscellaneous other tech projects
He is intelligent, but not experienced. His pattern indicates two dimensional thinking. -- Spock in Star Trek: The Wrath of Khan...
Posted : 08/06/2019 8:59 pm
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