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ABS print filament folding inside extruder and gets stuck

Posted by bw_syl 
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bw_syl
ABS print filament folding inside extruder and gets stuck
May 12, 2016 06:40AM
Hello,

I have good printing results with PLA, but when I try to print using ABS, the print starts correctly but after a few seconds the filament folds into the extruder (inside the cold end) and everything gets stuck.

I've tried to reduce the temperature to 230°C, then I've managed to print a calibration part, but on the following prints I still gets the same problem.

What do you think can cause this problem ?


Thanks a lot.
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Downunder35m
Re: ABS print filament folding inside extruder and gets stuck
May 12, 2016 07:40AM
If it can fold inside the cold end than it is pretty obvious that the inside diameter is far too large.
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the_digital_dentist
Re: ABS print filament folding inside extruder and gets stuck
May 12, 2016 07:56AM
Are you trying to use 1.75 mm filament in a 3 mm extruder/hot-end? You can't do that.

Pictures?

Ultra MegaMax Dominator 3D printer: [drmrehorst.blogspot.com]
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bw_syl
Re: ABS print filament folding inside extruder and gets stuck
May 12, 2016 08:19AM
According to the website where I bought the extruder, it's for a 1.75 mm filament (and I succeed to print PLA with 1.75 filament).

I've attached a file where I've highlighted the part where the filament folds.

I'll send a picture with my extruder and the filament stuck as soon as possible.
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Attachments:
open | download - C_all metal-1000x1000.jpg (125.9 KB)
the_digital_dentist
Re: ABS print filament folding inside extruder and gets stuck
May 12, 2016 08:30AM
That's the hot-end. What about the extruder?

Ultra MegaMax Dominator 3D printer: [drmrehorst.blogspot.com]
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bw_syl
Re: ABS print filament folding inside extruder and gets stuck
May 12, 2016 08:37AM
It seems that I have a lack in my vocabulary, I thought that was the extruder, so my filament is stuck in the part that I've surrounded in black in the picture of my previous post.

Sorry for the mistake
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amigob
Re: ABS print filament folding inside extruder and gets stuck
May 12, 2016 09:01AM
If this a a genuine or a good copy of the e3D V6 then you need a PTFE tube in side of the cold end ( aluminum cooling part )



middle one

Did you have that ?

P3steel DXL, with Due/RADDS/Raps128 dual Wade's extruder
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bw_syl
Re: ABS print filament folding inside extruder and gets stuck
May 12, 2016 10:38AM
It's like the middle one, but I haven't inserted ptfe tube, I'll try this tonight.

Thanks a lot !
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bw_syl
Re: ABS print filament folding inside extruder and gets stuck
May 17, 2016 12:03PM
Thanks to your advice, it work well now, I've added PTFE tube and nothing gets stuck.

I've drilled the plastic part to have the ptfe tube on whole length (see pictures).

Again, thanks a lot !
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Attachments:
open | download - IMG_20160516_205206.jpg (381.4 KB)
open | download - IMG_20160516_205251.jpg (233.2 KB)
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