Should i worry? Any suggestions for a fix? Didnt find anything because i dont know what search terms to use…
Edit: Thanks for your responses. I talked to my brother, he told me the retraction speed was too slow (25mm/s), i changed it to 40mm/s and realized i activated the wrong printer profile. Silly me. Ill do a test print now. Ill look into your suggestions if this wont help.
Thank you!
One additional counter measure that is not mentioned in the article is doing a slight z-hop (like half the layer heigt) for travels. That can help prevent depositing the ooze-drop along the travel move, given that all other mitigations are in place and the ooze-drop is small enough. Do not hop very high, because the vertical lift will pull strings out of the nozzle otherwise.
This is oozing. It’s a subset of stringing. It’s related but not exactly the wispy stuff you’re gonna commonly see. This isn’t plastic still connected to the part as the nozzle moves away. This is from plastic that continued to ooze out after the retraction and it builds up on the receiving part. They’re angled like lightning bc the first blob is on the part, the second blob is on the first, etc, etc.
It’s kind of solved similarly to stringing! In addition to what @tonyn@lemmy.ml linked, I’ve also used Coasting in Cura. Prusa Slicer doesn’t have an exact analog to coasting. Coasting helps more when you have a bowden tube than a direct drive.
As other people have said, oozing. In addition to their fixes I would suggest looking into sequential printing as a print method to be aware of. Rather than printing two objects layer-by-layer, sequential printing will complete all the layers of one object before starting on the next. This has the major benefit that you get zero oozing or stringing between parts. This can be a lifesaver on materials like PETG that will always string to some extent. The only gotcha is that you have to place the parts further apart on the print bed, as the extruder will collide with any nearby completed parts (Prusa slicer has all of this built in, including alerting you if any collisions would occur). I don’t recommend it for every print, but it’s a useful tool to have in your toolbox.
Sometimes I print TPU with my Ender 3 Pro, which, with its bowden tube, makes stringing and oozing all but unavoidable, and as a result, I print just one item at a time as you suggested.
I don’t think you need to worry, as the print quality otherwise looks good. Check your “retraction” setting, as it seems like it’s just continuing to ooze out a bit on move commands. If you have a direct drive extruder, 1-2mm will probably cut it, but with a Bowden tube you may need to set it higher.
Dry your filament.
