RE: Print quality issue - Small spots on curved surfaces
Very interesting discussion.
I am facing the same defects.
@epic-space-models can you give an update on if and how you were able to improve the surface quality and get rid of the deficts.
Best Regards
RE: Print quality issue - Small spots on curved surfaces
Bump
Recently built a Mini+, even with the included benchy file, experiencing the same thing as shown in OP's images
any solutions to this?
RE:
Silk contains a bit of elastic component which causes this flexible shrinking as soon as it cools down - so you have to decrease retraction as much as you can. Otherwise I guess what is happening is you retract it back to the cooler parts (heatbreak) and retract herself even more - while sucking air wherever it can. Than spit that air back later on somewhere when you don't expect it - hence causing a tiny underextrusion miles away.
]So you need to stop wiping, Z hop, decrease the retraction as much as you can, as slow as you can, then push a little back during de-retract. Tighten the extruder idler a bit. Minimum travel after retraction looks good on paper to decrease the small travel retractions, but increasing it on a tiny model (such as the benchy) could cause most of the retractions turned off - which isn't a good idea (I've learned it around 5th or 6th benchy when I dig deep...)
A capricorn ptfe bowden (and a dual gear extractor) doesn't hurt to make that tiny retraction work...
RE: Print quality issue - Small spots on curved surfaces
FYI, I'm almost certain it's moisture. I bought eSun Matte Filament and I guess it's super sensitive to moisure as I left it out for maybe a few weeks on my 3D printer and recently it has similar symptoms. It's not quite air bubbles but you can see the filament "dip" randomly'
I had a filament dryer at the time but I was too lazy to unload the filament so I just put it around the spool, leaving about ~1m of filament from the spool to the PTFE tube to the printer head which was not dried.
I printed this model and noticed a drastic change in quality halfway through, I assume the bottom half was the undried and the top half was the dried filament. Quite drastic, especially only leaving the filament out for a few weeks. I guess it heavily depends on the filament you buy.
