laBOMBA
Posts: 1
Joined: Mon Sep 21, 2020 11:22 am

Zits vs Layer Inconsistency

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.
IMG_20200922_013710.jpg
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.
IMG_20200922_013727.jpg
IMG_20200922_013747.jpg
Any ideas on how to resolve the print quality issues I'm experiencing?
S3D-Jake
Posts: 1048
Joined: Wed Jun 20, 2018 12:45 pm

Re: Zits vs Layer Inconsistency

Coasting or Extra restart distance should be the two main settings to look at. Which one needs changed will be determined by if the blobs are a function of the priming happening or if there is too much pressure built up at the end of your layers.

For more on solving blobs and zits: https://www.simplify3d.com/support/prin ... -and-zits/
"A bird does not sing because it has an answer. It sings because it has a song."

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