1 Topic by rayhklee

  • rayhklee
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Topic: filament in the metal tube

yesterday i want to chnage the filament, but maybe i unload it wrongly, there is some filament in the metal tube, ie the tube above the nozzle, I try to clean the nozzle, print some product, till nothing how out, that filament still in the tube. can anyone tell me how to solve it?

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2 Reply by jenne

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Re: filament in the metal tube

I have exactly the same problem with my Davinci jr now..
Had you found a solution yet?  I would try to heat it up in the stove or with a heatgun,  however i am afraid of killing the cables which are attached to it.

Also in the jr it seems to be solid connected with the noozle.

3 Reply by carl_m1968

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Re: filament in the metal tube

When this happened to me even on other printers aside from the Da Vinci. I just heat the unit to normal temp them press and old drill bit that is 1.5mm in diameter smooth end first into the tube to force the material in and make it come out melted.

Printing since 2009 and still love it!
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4 Reply by AZERATE (edited by AZERATE 2016-05-03 00:01:19)

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Re: filament in the metal tube

This eventually happens with inferior hotends.
While I sell E3D hotends fully assembled, I would like to point out that I personally struggled with similar issues and only started carrying E3D after I (wardjr, jagowilson, ironman) was entirely won over.

You can either heat it to the near-full limit temp your firmware came allow and plunge a probe, or you can upgrade and be done with it forever.
I had tow PLA clogs in the last month while stress testing the E3D Titan, and I can confirm that even ABS clogs are easily cleared!

Printit Mason and Printit Horizon printers
Multiple SD2s- Bulldog XL, E3D v5/v6/Lite6, Volcano, Hobb Goblin, Titan, .9 motor, Lawsy carriages, direct Y drive, fishing line...the list goes on
Filawinder and Filastruder #1870.....worth every penny!

5 Reply by jenne

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Re: filament in the metal tube

I would change to a new hotend directly, unfortuneatly i believe there is no one for the Da Vinci junior.

By the way, my stucked filament had been wooden one, so i don`t believe that it will simply melt by warming up :-(

6 Reply by kr15_uk

  • kr15_uk
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Re: filament in the metal tube

Happened to me couple of times
My fix is quite simple:
1. drill pretty much half way through (don't want to go too deep to not to damage hotend or so with sharp edges of the drill)
2. use soldering iron to heat it up (I use variable temp one to have better control of the temperature)
3. fold some thin but sturdy solid core wire inner bit and poke it a bit (fold at the bottom helps old filament to stick)
4. If filament is in "liquid" state I use so called "sucker" (vacuum thing which you use when desolder something)
5. If filament is hard and dry and not melting anymore then heat from the soldering iron is high enough to make it so "cooked" that it crumbles and can be cleaned easily.

To remove leftover residue I use compressed air and usually 1st print (5-10m worth) clears it completely from any dust or so.

Hope this helps.

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