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Stringing with high flow nozzle  

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mbiasotti
(@mbiasotti)
Trusted Member
Stringing with high flow nozzle

I recently switched to a high flow 0.4mm obxidian nozzle on my Core One.  Without any changes other than updating my printers and connect settings, I noticed that I'm getting some "stringing" using my default ASA filament that I didn't have before with my standard nozzle.

It kinda makes sense given that the high flow nozzle is moving more material, but would like to correct it if I can in my Prusa slicer settings. Has anyone else experienced this and if so, did you correct it by changing your default setting/s?

Mark

Posted : 20/01/2026 11:11 pm
hyiger
(@hyiger)
Noble Member
RE: Stringing with high flow nozzle

That’s usual when switching to a HF nozzle. You can increase retraction distance, retraction speed and maybe lower the nozzle temp 10° or so. 

Posted : 21/01/2026 3:07 am
mbiasotti
(@mbiasotti)
Trusted Member
Topic starter answered:
RE: Stringing with high flow nozzle

@hyiger   -  Do you have any recommended value/s on increased retraction distance and speed?

Posted : 21/01/2026 7:00 pm
Ruebarb
(@ruebarb)
Trusted Member
RE: Stringing with high flow nozzle

As Hyiger said, nozzle temp 1st. Print a temp tower. Once you have the best temp, then a stringing test file.

 

I haven't used ASA and I don't use HF nozzles. But I have found for ABS & PETG, PCTG, the default settings for Prusa PETG, in the filament overrides, worked for all 3 of those.  I would use that as a starting point to see any improvements. Wipe while retracting for PCTG made the problem worse. For the other 2 it helped alot.

Posted : 21/01/2026 8:19 pm
mbiasotti
(@mbiasotti)
Trusted Member
Topic starter answered:
RE: Stringing with high flow nozzle

Thank you @hyiger and @Ruebarb - for your advice. I will experiment and try to get it tuned in.

 

Mark

Posted : 21/01/2026 9:31 pm
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