Zits vs Layer Inconsistency
Posted: Mon Sep 21, 2020 11:55 am
I've been troubleshooting zits for a little while now, and still can't get a perfect print.
This part in image below prints fine: good layer consistency, good strength (considering it goes to 0.4mm top layer) and no imperfections aside from those damned zits.
These are my specs and settings (of the print above):
Creality3D CR10 S4
0.38mm extrusion width
0.9 extrusion multiplier
Retraction: distance 6mm, extra restart distance -0.2mm, no lift, retraction speed 3600mm/min, coasting distance 0.2mm, wipe distance 5mm
I'm using random start points, no infill (there is none anyway)
temp 205C first layer, 185C other layers
fan speed at 60%
print speed 3200mm/min
So I've gone and done some troubleshooting to try and get rid of those zits, but anything I do seems to make it worse.
I've mostly played around with retraction settings (even printed a test with no extraction settings and the print was nearly perfect, aside from the obvious oozing resulting from zero retraction).
While playing around with retraction settings, I managed to reduce the apperance of zits, but now my layer cohesion is crap and the part where the two outer layers come together to a point (approx 15 layers from the top) looks like it is printing a few layers with inconsistent materials. There's gaps here and there. Images below.
Any ideas on how to resolve the print quality issues I'm experiencing?
This part in image below prints fine: good layer consistency, good strength (considering it goes to 0.4mm top layer) and no imperfections aside from those damned zits.
Creality3D CR10 S4
0.38mm extrusion width
0.9 extrusion multiplier
Retraction: distance 6mm, extra restart distance -0.2mm, no lift, retraction speed 3600mm/min, coasting distance 0.2mm, wipe distance 5mm
I'm using random start points, no infill (there is none anyway)
temp 205C first layer, 185C other layers
fan speed at 60%
print speed 3200mm/min
So I've gone and done some troubleshooting to try and get rid of those zits, but anything I do seems to make it worse.
I've mostly played around with retraction settings (even printed a test with no extraction settings and the print was nearly perfect, aside from the obvious oozing resulting from zero retraction).
While playing around with retraction settings, I managed to reduce the apperance of zits, but now my layer cohesion is crap and the part where the two outer layers come together to a point (approx 15 layers from the top) looks like it is printing a few layers with inconsistent materials. There's gaps here and there. Images below.