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Idler Tension  

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Swishtail
(@swishtail)
Eminent Member
Idler Tension

Hi, 

Peeking through my PFTE tube, I see little teeth marks in my filament as it heads from the extruder to the hot end.  Is this normal?  Is my idler tension perhaps a bit too tight?  I desperately want to avoid clogging the machine, as the last time I did, I essentially replaced the entire hot end trying to get it clear, clean, and running again.

Posted : 29/10/2020 7:09 pm
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(@)
Illustrious Member
RE: Idler Tension

Tooth marks are why the drive gears have teeth.  Normal. If the filament is flattening, then that's probably too much. 

Posted : 29/10/2020 7:18 pm
Swishtail
(@swishtail)
Eminent Member
Topic starter answered:
RE: Idler Tension

@tim-m30

Thank you.  Yes, I’m seeing teeth marks rather than the deep gouges I saw before when I had a major clog.

Posted : 30/10/2020 12:51 am
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herbert
(@herbert)
Trusted Member
RE: Idler Tension

This is how someone from Prusa Support showed me how to setup the idler tension

https://imgur.com/kSLQHEt

Special care should only be taken if using flex materials, because they are softer otherwise his advice was

Generally speaking - more tension should be better than less tension. Although, less tension is needed for example for the flexible filament 🙂

Posted : 30/10/2020 10:45 am
Alex Hung and Oxygen liked
toz
 toz
(@toz)
Eminent Member
RE: Idler Tension

@herbert

video would be of great help in the instruction for the mini, or not?

helped me a lot to clearify how this setting should be 

Posted : 31/10/2020 3:59 pm
herbert
(@herbert)
Trusted Member
RE: Idler Tension

The prusa-support-engineer knows about how helpful this video was for me and tries to get this into the official documentation 😉

Posted : 02/11/2020 10:42 am
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