1 Topic by degrassijrhi

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Topic: Extruder gouging solidoodle filament

I've read through some other threads and if I've overlooked a fix for this, please just send me there and delete this thread. I've thoroughly cleaned the gear out and made sure that the end is not clogged (can pan filament through) but when I load up the filament I get about 50mm worth or printing and the flow stops. The gear continues to move smoothly and the end is still hot. When I stop it and take the filament out, there is a gouge which makes me believe that the gouge won't allow the filament to continue down into the hot end stopping the flow of filament and pressure. The gear will also be filthy with filament dust again.

https://youtu.be/DrWg7WhiVxk


Here is a pic of slightly gouged filament though I've had much worse.

2 Reply by degrassijrhi

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Re: Extruder gouging solidoodle filament

http://soliforum.com/i/?cWbMFff.jpg

3 Reply by carl_m1968

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Re: Extruder gouging solidoodle filament

degrassijrhi wrote:

I've read through some other threads and if I've overlooked a fix for this, please just send me there and delete this thread. I've thoroughly cleaned the gear out and made sure that the end is not clogged (can pan filament through) but when I load up the filament I get about 50mm worth or printing and the flow stops. The gear continues to move smoothly and the end is still hot. When I stop it and take the filament out, there is a gouge which makes me believe that the gouge won't allow the filament to continue down into the hot end stopping the flow of filament and pressure. The gear will also be filthy with filament dust again.

https://youtu.be/DrWg7WhiVxk


Here is a pic of slightly gouged filament though I've had much worse.


It looks to me like you are too close to your bed. That would cause back pressure in the nozzle and make the flow stop shich would just cause the gear to dig in and chew up the filament. You should have at minimum a .10mm gap between the nozzle and bed. Up your z offset by .5 and see what happens.

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4 Reply by madfalcon81

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Re: Extruder gouging solidoodle filament

What temperature do you use ? ABS or PLA ?

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5 Reply by degrassijrhi

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Re: Extruder gouging solidoodle filament

It's abs and the bed is 97c and the extruder is running at 230c but I've ran the extruder at temperatures between 230c and 250c.

6 Reply by madfalcon81

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Re: Extruder gouging solidoodle filament

Try lowering the temp on ABS. If it works, this means the filament is melted BEFORE entering the nozzle. Try 210-215. Keep us posted.

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7 Reply by degrassijrhi

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Re: Extruder gouging solidoodle filament

I'll lower the temperature and the bed as wel after work. I'll update around 4:45pm est.

8 Reply by degrassijrhi

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Re: Extruder gouging solidoodle filament

Cooled temperature. 210℃. Cleaned extruder with fresh filament end. 100mm extrude failed. Cut and reinserted filament and pushed through by hand (hot enough to melt it). Then attempted to extrude 50mm. It began to try to extrude but failed maybe 1mm or less extruded right at the beginning. Video link in an hour. This was all at home position.

9 Reply by degrassijrhi

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Re: Extruder gouging solidoodle filament

http://soliforum.com/i/?9erjwKv.jpg

Where is the filament supposed to be getting hot? When I put filament in to force some out it seems to melt in the A section of the picture...

10 Reply by madfalcon81

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Re: Extruder gouging solidoodle filament

If it melts before entering the nozzle (before A area), then the stepper cannnot push the filament anymore. BTW, did you cheched if the fan on the right of the extruder blows air in or out ?

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11 Reply by degrassijrhi

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Re: Extruder gouging solidoodle filament

It was blowing out. I flipped it yesterday to blow into it due to some threads I've read on these forums but that didn't help. I'm pretty sure it's melting pre-nozel. If that's the case then the drive gear will be unable to push the filament so it will just spin at the same spot causing the gouging. Does that sound accurate?

12 Reply by degrassijrhi

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Re: Extruder gouging solidoodle filament

I don't think it's melting before A but IN A.

13 Reply by degrassijrhi

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Re: Extruder gouging solidoodle filament

https://youtu.be/21tbRvEjgd4

Here is the video of it extruding by hand but not through the extruder.

14 Reply by trayracing

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Re: Extruder gouging solidoodle filament

degrassijrhi wrote:

http://soliforum.com/i/?9erjwKv.jpg

Where is the filament supposed to be getting hot? When I put filament in to force some out it seems to melt in the A section of the picture...

The narrow bit at the bottom of A is the "heat break". Above this, filament should be below Tg (glass transistion temp). The extruder body acts as a heat sink to keep the top of A "cool". When you take the tube out of the extruder body (as pictured), A will not stay cool.

If you heat the hot end outside the extruder, it will melt plastic above the heat break. Be sure to remove/purge any melted plastic from above the heat break, as this will harden and cause problems for normal extrusion. (Purge with a 1.5mm Allen wrench, or the back end of a 5/64 drill bit. Hot! Carefully.)

Things to check: the  drive wheel is lined up front-to-back with the rest of the extruder.

Could also have some junk in the nozzle. A few ways to tackle that are bring the extruder up to temp, then turn off the heat and let it cool to 160C and pull out the filament. Ideally this pulls out a little swollen plug of filament, which was the melt pool. With luck, a little clump of something is in there.  (If the filament snaps inside the tube, then the temp was a little cold. If the end necks into a long string, it was a little hot. Adjust and repeat as needed.)

15 Reply by degrassijrhi

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Re: Extruder gouging solidoodle filament

If I can manually push filament out I don't think it's clogged. I've cleared it with an Allen wrench. The drive gear may be out of position but I've moved it forward and backward on the axel but with no change.

16 Reply by akhs001

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Re: Extruder gouging solidoodle filament

I have the same problem.i try everythink but nothing.

17 Reply by trayracing

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Re: Extruder gouging solidoodle filament

akhs001, you may have the same outcome, but there's a whole pile of scenarios for gouging, so your cause may be different. Here's some scenarios, roughly top to bottom:

  • Junky/dirty/dusty/soggy/oversized/undersized filament

  • Feed problem (kinked filament, jam at spool or feed path)

  • Dirty drive wheel

  • Misaligned drive wheel

  • Not enough idler pressure

  • Misaligned/jammed idler

  • Extruder motor too hot (softening filament at drive wheel)

  • Bottom end of extruder too hot, kinking filament

  • Top end of tube too hot (bulging filament)

  • Cooled plastic stuck in top of heat break

  • Nozzle misaligned to heat break tube

  • Nozzle tightened to heater block, not heat break tube

  • Heater set too low

  • Inaccurate temperature reading

  • Temp drops during extrude (weak wires/supply, loose heater)

  • Feed rate too high

  • Junk in nozzle body/heat break

  • Cooked filament in nozzle body/heat break

  • Junk/cooked filament stuck in orifice

  • Nozzle orifice peened too small by bed crashes/collisions.

  • Extruding first layer too close to bed (back pressure causes stripping)

I left some out, since we're talking specifically about Press with ABS. Try ruling out the easy things first so you don't make things worse rather than better. (For example, reassembling the heater block too high on the heat break pipe will overheat the bottom of the extruder and the top of the heat break tube.)

18 Reply by akhs001

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Re: Extruder gouging solidoodle filament

hELLO  trayracing.Thanks for helping.I delete some of the list iam 100% sure there is not reason because i tried..
Please can be more detailed to the others to help me try more solution.
Eg. How can i align the drive wheel.Or this "Nozzle tightened to heater block, not heat break tube" what you mean? please help.


junky/dirty/dusty/soggy/oversized/undersized filament ----(NO)
Feed problem (kinked filament, jam at spool or feed path)    ----(NO)
Dirty drive wheel             ----(NO)
Misaligned drive wheel   
Not enough idler pressure      ----(NO)
Misaligned/jammed idler
Extruder motor too hot (softening filament at drive wheel)
Bottom end of extruder too hot, kinking filament
Top end of tube too hot (bulging filament)
Cooled plastic stuck in top of heat break          ----(NO)
Nozzle misaligned to heat break tube
Nozzle tightened to heater block, not heat break tube
Heater set too low                      ----(NO)
Inaccurate temperature reading
Temp drops during extrude (weak wires/supply, loose heater)
Feed rate too high               ----(NO)
Junk in nozzle body/heat break             ----(NO)
Cooked filament in nozzle body/heat break               ----(NO)
Junk/cooked filament stuck in orifice                 ----(NO)
Nozzle orifice peened too small by bed crashes/collisions.             ----(NO)
Extruding first layer too close to bed (back pressure causes stripping)          ----(NO)

19 Reply by madfalcon81

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Re: Extruder gouging solidoodle filament

akhs001 wrote:

I have the same problem.i try everythink but nothing.


just when I posted some advices I had that problem. The idea that I am going with is the high temperature of the inside. I print now with the upper door open and the front one closed. The upper one stands on the front door, thus leaving some space up for some fresh air to come. Try this.

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20 Reply by akhs001

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Re: Extruder gouging solidoodle filament

I have tryed everything.Nothing works.Top and front door open.I print 30 minutes and then No filament coming out.

21 Reply by Goshdarnit

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Re: Extruder gouging solidoodle filament

I was having the same issue and ended up giving up and fitting an E3D Lite6. I know that's not what you want to hear, but if you've raised your z-offset and it's still happening...

The E3D has solved my problem, but really: double check your z-offset first. You should make it lower than its current value (not higher as someone else said earlier in the thread). Just as a way of testing this out, try setting it to 0.0! You'll get no adhesion, but if it extrudes OK then that's your issue.

22 Reply by akhs001

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Re: Extruder gouging solidoodle filament

i believe the problem its the ambient temperature.If its too hot the extruder cant cold and the filament melted.
The day i had the problem the temperature here in greece was 39 c . Today i made a PID calibration and i have a succesfull 45 minute print.But the temp today is 21 c.
I try to print again one hot day and if i have the same problem its the ambient temperature.If i dont have the same problem
the PID calibration do the job. wink

23 Reply by joeix3 (edited by joeix3 2015-06-19 04:53:04)

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Re: Extruder gouging solidoodle filament

Have you tried this ...


http://www.soliforum.com/post/99374/#p99374