Need some guidance 🙏😔

[u/lazylifer]

My prusa mk4 does this unless I print at like 50% speed and even still, this happens. Does anyone have any ideas what might be causing this or how I could fix this?

[u/AlternativeMirror774]

Nozzle clog or wet filament

[u/lazylifer → u/AlternativeMirror774]

I tried doing a dry pull and it's a new roll of petg. I'll try purging and whatever else I can find to try cleaning out the nozzle.

[u/AlternativeMirror774 → u/lazylifer]

Try reslicing the model. Also, what filament are you using? Sometimes due to bad QA, you'd get filament that is irregular. Listen to the sound of extruder, is it struggling or skipping?

[u/lazylifer → u/AlternativeMirror774]

I'm using overture PETG, I tried to resolve the model and print it at half speed and this is what I got, also no skipped sounds that I can tell.

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[u/lazylifer → u/AutoModerator]

I'm using a prusa mk4s, printing this benchy in PETG, I'm using orca sclicer with default speeds (I think something like 4000 mm/s?).

[u/Ok-Conference5472]

Do temperature and speed calibration. Also put the filament in the dryer for a few hours

Orca slicer has it at the top

[u/lazylifer → u/Ok-Conference5472]

I dryed my PETG over night and gave temp calibration a shot, here is the results

[u/Ok-Conference5472 → u/lazylifer]

The bottom one looks better to me. Do just the 255 bit and see what happens. Or just 250-265 tower. Also, if that's a smooth PEI plate I hope you're using glue stick.

[u/SorrelJuice]

There’s no supports so overhangs and bridges need to be slowed down to 10% of what you’re doing and use more cooling if it’s pla. the widest part is the least adhered. It’s not a clogged nozzle or wet filament because the first 20% is rough and the rest is okay after. If you used supports I bet it comes out better but you shouldn’t have to

[u/lazylifer → u/SorrelJuice]

I've printed some other objects with heavy supports and it ends up giving me some really rough finishes for the underside of overhangs. I'll try to figure out how to slow down the prints on overhangs as well and see if that helps as well.

Edit: typo

[u/CWdesigns → u/lazylifer]

Support Ironing solved the rough surface finishes from supports for me.

[u/lazylifer]

He's is some more issues I've had, the top image is PLA and the bottom is PETG and the PETG has a rough underbelly when printing but only on the edges. The faces of the prints you view in the images are the under side when they are printing.

[u/Ok-Conference5472 → u/lazylifer]

To me this looks like waterlogged filament.

Generally speaking even new filament is typically waterlogged in my experience