1 Topic by hall_philip

  • hall_philip
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Topic: Trouble with PETG-Need some advice

Hi guys, hoping someone could shed some light on my situation. I have been able to run ABS with no issues thus far, PETG on the other hand is bad from the start. I have tried temps from 180-240 and increase the stall to 9 turn per manual, but I'm still having the motor stall on me after the filament just starts coming out of the nozzle. should I drill my nozzle out larger? filament is coming out very thin. I have checked and cleaned the nozzle with no jam found there. If someone could help me with a few ideas that  would be great.

2 Reply by genesat1

  • genesat1
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Re: Trouble with PETG-Need some advice

I drilled out a nozzle (I would advise getting extra ones, don't do it to your only one if you plan on doing ABS again later), and then turned the temperature up when I extruded PETG.

In my experience PETG extrudes nearly as easy as ABS with the right temperature and nozzle size.

3 Reply by hall_philip

  • hall_philip
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Re: Trouble with PETG-Need some advice

What temps and nozzle size are you using, I have recently tried nozzles from 1.7 to 2.2mm, temps from 190 to 235 with all nozzle changes. I recently tested at 2.2mm and 235C with a pretty steady extrusion 1.6A but with unacceptable tolerances. I am using a vertical mount lots of cooling fans and a filawinder.

4 Reply by eric.s.hall.em

  • eric.s.hall.em
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Re: Trouble with PETG-Need some advice

Extruding virgin PETG pellets from Eastar (the ones sold on the filastruder web site) works great for me (Note - I only have trouble when extruding reground PETG but I think I am making good progress).  Can you put some pictures of your setup?  Take a closeup picture of the nozzle, insulation, and hopper.

5 Reply by hall_philip

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Re: Trouble with PETG-Need some advice

Eric I will get things posted sometime this weekend. thanks guys for lending me a hand here. I have  Eastar from the web site also. I have tried full insulation and half barrel.

6 Reply by genesat1 (edited by genesat1 2017-10-27 14:39:36)

  • genesat1
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Re: Trouble with PETG-Need some advice

Be sure to look at the display when it stalls and see the actual current being drawn.  You might be current limiting it somewhere lower than the recommended ~1.6A.  Also, empty the barrel enough you can move the augur in and out, then check that your thrust bearing hasn’t moved.  PETG is very viscous, and if your thrust bearing comes loose you have all that force pushing back against the gears in the motor rather than directing that force on the metal enclosure.