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CalebLA
(@calebla)
Active Member
Filament Snapping in Extruder

Hi everyone!

I've recently had some issues with one of my Prusa minis having filament problems.

I own three Prusa mini's and this particular one makes the filament get really whittled down or broken 30 or so minutes into the print, making the print fail. When I remove the filament, it sometimes comes out in one piece but one part of it (I assume the one stuck in the extruder gear) is really thinned out or broken.

I'm pretty sure it's not brittle filament as I used it on another printer and it printed fine...

Any help would be greatly appreciated!

Pic Below!

Thank You,

Caleb

P.S.  I am using Hatchbox yellow PLA

Posted : 29/09/2022 11:28 pm
cwbullet
(@cwbullet)
RE: Filament Snapping in Extruder

This can happen if the idler is too tight or if there is too much tension on the filament.  Do you have a filament sensor?

--------------------
Chuck H
3D Printer Review Blog

Posted : 30/09/2022 10:31 am
fuchsr
(@fuchsr)
Famed Member
RE: Filament Snapping in Extruder

Time to get a Bondtech dual drive extruder, only upgrade to the Mini I truly recommend.

Posted : 30/09/2022 10:47 am
cwbullet
(@cwbullet)
RE: Filament Snapping in Extruder

That might help if the point I mentioned above is not the cause.  I would check for resistance to smooth filament movement (friction) in the tubing or filament sensor prior to the extruder, first.  

Posted by: @fuchsr

Time to get a Bondtech dual drive extruder, only upgrade to the Mini I truly recommend.

 

--------------------
Chuck H
3D Printer Review Blog

Posted : 30/09/2022 10:53 am
CalebLA
(@calebla)
Active Member
Topic starter answered:
RE: Filament Snapping in Extruder

Thanks for all the replies!

I do have a filament run-out sensor, but I am not sure how to change the idler tension...

Posted : 30/09/2022 4:06 pm
CalebLA
(@calebla)
Active Member
Topic starter answered:
RE: Filament Snapping in Extruder

What are the advantages of a dual drive extruder? I haven't heard about it before.

Posted by: @fuchsr

Time to get a Bondtech dual drive extruder, only upgrade to the Mini I truly recommend.

 

Posted : 30/09/2022 4:07 pm
cwbullet
(@cwbullet)
RE: Filament Snapping in Extruder

It is also called the tension screw.  

https://help.prusa3d.com/article/idler-screw-tension_177367

I would highly recommend you learn a little before going with the Bondtech.  

Posted by: @calebla

Thanks for all the replies!

I do have a filament run-out sensor, but I am not sure how to change the idler tension...

 

--------------------
Chuck H
3D Printer Review Blog

Posted : 30/09/2022 10:19 pm
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