Submitted 17 hours ago by Starfarer@lemmy.today to 3dprinting@lemmy.world
https://lemmy.today/pictrs/image/0313ec49-106b-4e9f-98fe-0a4d4ed95813.jpeg
Hi,
I’ve just swapped to a new PLA (Sunlu wood filled) and I’m getting strange lines in my top layer.
It is like some areas are just not being extruded at all.
Any ideas how I go about finding the cause of this?
Looks like classic wood filled filament clog.
The rest of the print is perfectly fine but the top layer is having issues? I would check the settings that effect only the top or top / bottom layers.
You said it’s a new filament, is it a new profile for the new filament as well or have you successfully printed other filaments with the exact same settings?
Its a slight tweak of the profile I use with other sunlu pla filament.
I’ve tried to top layer setting tweaking bit not luck so far
Have you verified it’s not a model issue? Also, is it on all top / surface layers, or only the final layers? Like if you printed a solid staircase, would each step have the surface messed up or just the top one?
nous@programming.dev 15 hours ago
Because that is what is happening. Wood filament is just PLA mixed with wood particles suspended in it. These particles are very likely getting stuck in the printer nozzle and stopping any more filament from being extruded. This is not the only cause of under extrusion like this but the most likely.
Given it clears its self up it is probably that the blockages are clearing themselves eventually with enough time/pressure/heat behind it. Or it could be a particle moving around inside the head (which I think is less likely).
Best thing is probably to get a larger nozzle that will be less prone to being blocked by larger particles in the wood PLA. You can also clear the nozzle as well with a tiny needle or a cold pull of the filament. This may help for a bit it there is stuff built up inside the nozzle or if it the blockage is self clearing it may not help at all (but wont hurt anything). But the better solution is likely a larger nozzle.