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How to unclog jammed extruder nozzle

by CreativeTools, published

How to unclog jammed extruder nozzle by CreativeTools Nov 17, 2012
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Summary

This video shows a simple way to unclog an obtruded 3D print Stepstruder which had a foreign object impeding the smooth flow of molten plastic.
http://www.youtube.com/watch?v=MJu_JycbIN4

By Creative Tools

Instructions

  • Place the USB microscope at a desired location
  • Turn on the heat on the Stepstruder
  • Bend outwards a wire of a small steel brush. The diameter of each wire may not be bigger than 0.3 mm
  • Carefully insert the wire into the stepstruder to unclog it
    See how to do this at: http://www.youtube.com/watch?v=MJu_JycbIN4

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i can do it without microscope.
but i had some problems to find a wire that fits my 0.4 nozzles

I had a similar problem, but the obstruction was too big to come out that way.  For my bowden setup, instead of pulling the head apart, I was able to just remove the bowden tube, heat the heater block to about 160, use this technic to push up obstruction and pull what I could with needle nose plyers.  that still didn't get it so used some ABS filamant (was printing PLA) to fish out the remaining filament goo, it stuck very well to the residual PLA.  That got it.

100c for PLA, and 150c for ABS are the optimal temps to pull out filament from the hot end, allowing it to pull basically all debris and "gunk" from the hot end along with it.

Start with a cool hot end, set the temp, and reverse filament when it starts getting near those temperatures.  It'll even occasionally pull the filament completely out of the nozzle orifice as well.  Reverse the filament all the way out, clip off the end, and put your fresh end back in the newly cleaned extruder.

Thanks for this tip. Sounds clever and easy to do. :)

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