Filament stuck in tube

I do not have an E3 to look at*, but this video shows you how to disassemble the hotend (where the filament is melted/extruded). If you do that you should be able to take the part out that has the filament stuck in it. Then try heating it in a pan in an oven at 400-450 Fahrenheit -- the filament should melt and run out. You may wan to use tin/aluminum foil to prop it up so that gravity will help that happen.




I have several R1 series, an R2 and a C2 -- but no E3

 

Here is one specific to unclogging the hotend/nozzzle

 

OK, that changes things -- possibly for the easier.
The PTFE tube the filament is in should be removable at both ends. If you can do that and can not get the filament out of the tube, then potentially just replace the filament feed tube. 1.75mm OD PTFE tube should work (and if I had an E3 I would be happy to confirm that). I have a few printers with bowden feeds (where the filament is kept in a PTFE tube all the way to the hotend) and that is the size we use. You can find that tube at just about any place that sells 3D printer parts (Amazon, PartsBuilt, etc)

https://www.partsbuilt.com/ptfe-tubing/

 

One thing that can contribute is that ABS and PLA filament get brittle (PLA is worse) as it ages and absorbs moisture. If your filament is starting to do that then try using a filament dryer (or a fresh roll of PLA) once you get the feed tube issue sorted.


[not a Robo employee just to be clear, I do volunteer here to keep the forums going]

 

To be really clear the 2mm OD PTFE is correct for 1.75mm filament