When I wanted to take out the filament from the extruder, it didn't wanna come out, it was stuck (even when I heated up the nozzle). So I unscrewed the nozzle and it looks like the filament is all pressed together at the top of the nozzle (see picture). What does this mean? I am heaving issues extruding filament from the nozzle, the filament barely comes out and the extruder motor is clicking. Can someone help, please.enter image description here

  • $\begingroup$ What is the white stuff? And the cylinder? from the pic it almost looks like you have some tape on the filament letting the glue run downwards towards the nozzle... sounds crazy, but I remember a guy on youtube having exactly that problem with his CR-10... $\endgroup$
    – mac
    Apr 18, 2018 at 14:12
  • $\begingroup$ The plastic is twisted, so it's damaged and damaged plastic becomes white. $\endgroup$
    – Yente Cool
    Apr 18, 2018 at 15:24
  • $\begingroup$ could be too soft a filament for a bowden, could be moist filiment, could be a physical obstruction, could be too fast a feed rate, could be too low a temp. $\endgroup$
    – dandavis
    Apr 19, 2018 at 3:25

1 Answer 1


As per attached picture I can see that the issue source could be:

  1. the ptf tube is not inserted to the end of heat-break, or it is not straight-cut at the end - see this video for help

  2. the cooler on the hotend is not working properly/not installed and heat goes up to the throttle and melts the material

  3. an object in the nozzle that blocks the flow (usually a ptf tube particle that probably melted) - clean/replace the nozzle

  • 1
    $\begingroup$ I didn't know you needed to put the tube in that far, I'll try that out, thanks $\endgroup$
    – Yente Cool
    Apr 18, 2018 at 15:08
  • $\begingroup$ @YenteCool the main problem is the point number 2 that creates the problem 3, so you will have that plastic worm. $\endgroup$ Apr 18, 2018 at 16:27
  • $\begingroup$ you can see this problem under this topic 3dprinting.stackexchange.com/questions/4927/… $\endgroup$ Apr 18, 2018 at 16:34

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