slic3r / Slic3r

Open Source toolpath generator for 3D printers
https://slic3r.org/
GNU Affero General Public License v3.0
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1.2.8-dev 1st layer and 2nd layer around the wrong way or miscalculated. Also top layers not touching edge. #2913

Closed a4jp-com closed 9 years ago

a4jp-com commented 9 years ago

My first layer is set for 0.3mm so it should be bigger with less lines than the second layer set at 0.21mm. The layers are reversed for some reason. Can you flip these the right way around please?

http://a4jp.com/3d-files/bugs/2015-06-15th-12-12-am-for-github-config.ini http://a4jp.com/3d-files/bugs/cube20bmm.stl

screen shot 06-15-15 at 12 24 am

Layer 1: 0.3mm is not 0.3mm but 0.21mm screen shot 06-15-15 at 12 19 am

Layer 2: 0.21mm is not 0.21mm but 0.3mm screen shot 06-15-15 at 12 19 am 001

Here the bottom layer is thicker which looks right. screen shot 06-15-15 at 03 08 am

kefir- commented 9 years ago

You should file separate issues for separate problems.

Don't know about the second issue, but what's wrong with the first and second layers of the box? What do you mean by "bigger" and "smaller"? From your pictures it looks like the layer heights are correct. It doesn't look like you've specified any extrusion widths, so a 0.3mm layer height will result in thinner extrusions than a 0.21mm layer. It looks right to me.

a4jp-com commented 9 years ago

0.3mm is bigger so the bottom layer should have less lines. 0.3mm is bigger than 0.2mm. I'm sure this is a mistake in the program.

a4jp-com commented 9 years ago

Hi kefir, I just fixed this post and made it one layer issue. I thought putting both together would be useful but will make another post for objects not having top or bottom layers.

kefir- commented 9 years ago

0.3mm is the layer height. You're extruding a cylinder of plastic from your printer's hotend, and if you squeeze that to thinner layers, the extrusion will be wider. That results in fewer lines in your second layer. Conversely, when you print a thicker layer it'll be squeezed less, and you'll have thinner extrusions, like in your first layer.

If you want wider (bigger?) extrusions and fewer lines and a thicker first layer, you'll need to change your first layer extrusion width under advanced settings.

a4jp-com commented 9 years ago

I understand that but my settings are default in the Advanced section. I'm not choosing to make it fatter and flatter as the instruction say. If I want it to do that I know I can set it there but it is at the default of 0. Please mouse over the infill field. It says how the settings work there.

1st layer: 0.3mm screen shot 06-15-15 at 03 20 am

2nd layer: 0.21mm screen shot 06-15-15 at 03 20 am 001

a4jp-com commented 9 years ago

screen shot 06-15-15 at 03 28 am screen shot 06-15-15 at 03 27 am

I think something is wrong with the calculation.

a4jp-com commented 9 years ago

screen shot 06-15-15 at 03 30 am

I couldn't delete the 0.21 number from the field. It gave me strange numbers.

a4jp-com commented 9 years ago

There are also 5 layers instead of 3 like I set.

a4jp-com commented 9 years ago

I just changed the bottom layer count to 2 but there was a 4th and 5th layer.

a4jp-com commented 9 years ago

test

I made a mistake pointing at the top 3 but the bottom 3 is what I was meant to be pointing at.

alranel commented 9 years ago

I don't see the problem. A thicker layer (in Z) will have thinner extrudates (in XY), so more lines. It's normal.

a4jp-com commented 9 years ago

Can you see the weird gap of the top layers? And I'll make another video to show where the miscalculation is unless it is the program trying to do something smart.

a4jp-com commented 9 years ago

gif2

a4jp-com commented 9 years ago

Everything looks okay now in 1.2.9-dev ^^

gif6