Horrible print quality within a layer range
I'm including 2 photos of a little dish I am printing. It looks like there is a range of layer heights at which the printer is messing up the print. It's worse on one side than the other. I haven't a clue why this would be and not sure what info to provide that might help people more knowledgeable than I fix the problem.
I can say that the side of the dish is at a 45º angle without supports for the walls (there were supports elsewhere, where the protrusions stick out). The wall is the same angle except for a 6mm section at the top (left in photo) that is perpendicular, Prusament PETG, nozzle ~240.
Any thoughts about the cause and solution to the problem would be appreciated.
RE: Horrible print quality within a layer range
The first thought is "cooling" but that may be just the first item on a list of issues. I'd go back to square one and check with a benchie that the printer works as intended. You could look at the layer-dependent fan controls whether anything correlates with the height. And, drying filament is never a bad idea.
For comparison, two Muesli bowls from my own collection (the yellow one is not postprocessed, the red/black one did see some grinding paper). It's on Core One, ASA and slightly steeper but that should matter only in details.
Make sure the print fan is clean and turning freely, check the fan shroud is correctly aligned and undamaged.
If problems persist save your project as a .3mf file
Files > Save Project as
Zip the .3mf and post it here. It will contain both your part and your settings for us to diagnose.
Cheerio,
RE:
@mnentwig @Diem
Taking my cue from your suggestions that this may be a cooling issue, and doing some additional research based on that thesis, it seems the print fan air flow of the i3MK3S+ may not be up to the task for some print jobs where the print fan airflow for certain parts of the model isn't sufficient. I think I recall reading that this is more likely to happen at the back of the model, exactly where the problem existed for me, because the airflow is coming from the front; possibly other factors such as parts of the model blocking print fan air flow. I'm sure you already knew about this.
Based on thesis I downloaded, printed and installed the Delta-P v2.2 fan duct from Printables.com. I have not as yet done any testing with it but hope it will help.
Most of my prints have been fine so I think it less likely there has been any issue with the fan or OEM shroud.
Examining the GCode seemed like a daunting task and I don't really have the expertise to know exactly what to look for.
If I can add anything to this thread at a later date I will do so. Meanwhile, thanks to all who have read and/or posted in reply to my query for your time and assistance.
RE: Horrible print quality within a layer range
so I think it less likely there has been any issue with the fan or OEM shroud.
Fan blades can gather enough dust to reduce efficiency surprisingly quickly if the air is dry enough for static build-up. Make a check and possible clean part of your regular monthly maintenance.
Cheerio,