0.6mm Nozzle issues - scrubbing hard over infill
Hi there, I followed the core one's guide on the website for how to change the extruder. It was printing great with 0.4mm.
I switched to a 0.6mm Prusa Nozzle ObXidian
I am 99% sure I did it correctly, it is pushed as far up as it goes, the thumb screws are nice and snug... i changed to 0.6 in the printer hardware menu. I got prusa slicer set to default 0.6mm settings/profile for HF0.6mm Core One.
First layer goes down great, but on subsequent layers particularly infill the nozzle is bashing/scrubbing up against the existing layers and to the point that it makes an awful noise and i am worried it might bend the heat-break so i stopped the print twice now. Any ideas what could be going wrong? You can see on the attached picture that the perimeter is also suffering from whatever is going wrong. I never had this trouble switching nozzle sizes on the MK3S so i am not sure how to diagnose it 🙁
RE: 0.6mm Nozzle issues - scrubbing hard over infill
0.32mm layer speed profile
generic pla
20% gyroid infill (rectilinear was causing worse issues)
maybe the default temp of 230 degrees is the issue? i think for generic PLA i never went over 200-215 with my old mk3s?
Also i see i was using a Prusament PLA for generic PLA... maybe my PLA is not fancy enough for that profile...
RE: 0.6mm Nozzle issues - scrubbing hard over infill
belt tension does appear to have been part of the issue... but i have now also reduced max volumetric flow from 30mm3/s to max 10mm3/s sacrificing a lot of speed.
:/ i was hoping the built in profiles would work better
RE: 0.6mm Nozzle issues - scrubbing hard over infill
The 0.6 obsidian is not a hf nozzle, if I’m right. So if you use the hf profiles ………..
No picture -- Moderators; is it stuck?
As observed by @ckobar above: I don't know of a HF ObXidian so you may have the wrong profile.
Cheerio,
RE: 0.6mm Nozzle issues - scrubbing hard over infill
Depending on the Infill, that's "normal" and depending on your speeds, the nozzle can't melt the already printed Infill lines and the scrubbing sounds start happening.
My mk3s didn't make these sounds, but probably just because it's so slow, that the existing lines slightly melt, when the nozzle is touching them.
If you didn't heat the sound with smaller nozzles, that's probably due to the lines being thinner and have less resistance, when being crossed.
There's a list for infills that cross existing infill lines and infills that don't:
https://help.prusa3d.com/article/infill-patterns_177130
Basically, infills that don't:
- Gyroid
- Rectilinear
- Aligned Rectilinear
- Line
- Concentric (I think)
- Honeycomb (my favorite)
- Hilbert Curve, Archimedian Chords, Octagram Spiral
RE:
@engineernick said, he allready used gyroid infill.
ps. just found it on the prusa shopsite. There is indeed an HF obxidian nozzel.
There is indeed an HF obxidian nozzel.
Interesting.
Presuming the interior pathways are the same - how would you use it?
The coating is intended to protect from abrasive particles but multiple narrow passages are more likely to clog with particles ... a recipe for frustration.
I assume they only exist because clueless users ask for them.
Avoid.
Cheerio,
RE: 0.6mm Nozzle issues - scrubbing hard over infill
Sorry for overlooking the mention of Gyroid Infill.
Without a video, I think we're pretty lost to what exactly is happening. Maybe overextrusion, so the nozzle is hitting the printed lines? 230° with a 0.6 mm nozzle might be leaking/oozing, causing overextrusion or similar artifacts.
RE: 0.6mm Nozzle issues - scrubbing hard over infill
There is indeed an HF obxidian nozzel.
Interesting.
Presuming the interior pathways are the same - how would you use it?
The coating is intended to protect from abrasive particles but multiple narrow passages are more likely to clog with particles ... a recipe for frustration.
I assume they only exist because clueless users ask for them.
Avoid.
Cheerio,
The division into multiple passages would be in the region where the filament melts, i.e. well above the nozzle tip, where the filament diameter is still much larger. I would expect even the subdivisions of the channel to have a significantly larger cross section than the nozzle tip. So I don't think "high flow" and "for abrasive filament with particles" are fundamentally contradicting requirements.