search

slic3r / Slic3r

Open Source toolpath generator for 3D printers
https://slic3r.org/
GNU Affero General Public License v3.0
3.33k stars 1.29k forks source link

Exterior brim causes incorect printing of support materials #4520

Open Lebensgefahr opened 6 years ago

Lebensgefahr commented 6 years ago

Version

1.3.0-dev 904baff

Operating system type + version

Windows 7 64

Behavior

If i turn on exterior brim the first layer of support material doesn't print at all and this causes that the next layer of support material have no basis to melt with. Exterior brim width = 0 wobrim

Exterior brim width = 5 wbrim

MortarArt commented 6 years ago

This may be related to; https://github.com/slic3r/Slic3r/issues/4427

mrvanes commented 5 years ago

I also see this problem. Build commit: 26b2a1e0cd36753c9f6e05609a5658cb91ab6727

These pictures may clarify what happens with and without external brim.

3mm exterior brim, layer 1. Pay attention to support in the upper left circle, (exactly) the brim width is missing: brim_01

3mm exterior brim, layer 2. Next suppor layer is deposited "in air": brim_02

0mm exterior brim, layer 1: brim_03

0mm exterior brim, layer 2: brim_04

superzerg commented 3 years ago

I have this problem as well (Slic3r v 1.3): Screenshot from 2021-01-16 16-56-48

Lebensgefahr commented 3 years ago

I found some interesting moment. If your layer high is 0.2 mm but your first layer high is 50% (0.1) it makes detail higher for 0.1 mm. I will try to explain. If your detail is 0.2 mm high and first layer is 50% of layer high than you will get detail with 0.3 mm high. But if your first layer high is 100% than you will get detail with 0.2 mm high. You can check this by running an easy test. And i think it will cause problems in support material printing for the first layer. Slic3r has a lot of bugs and it is not supported as far as i can see. I reported another bug few weeks ago.