Strange behaviour in Cura 14.01

[dipicorg 1]

I update to Cura 14.01 on Windows 7 64bit. In OpenSCAD i created a simlpe TestBox 2) with 40x40x10mm and a Shell (Wall) off 0.4mm. When Cura sliced it with the Settings in 1), the Result was like the Image in 3)

The resulting Print looked the same like 3). The Wall is 0.8mm instead of 0.4mm on the printed Sides! Is this a desired Behaviour or a Bug?

1) http://www.dipic.org/CURA/C1401-Settings.jpg

2) http://www.dipic.org/CURA/C1401-NormalView.jpg

3) http://www.dipic.org/CURA/C1401-LayerView.jpg

 

[Dim3nsioneer 361]

Cura might have a problem with 0.4mm thin walls. There are some ways to get reasonable results for thin walled thin boxes etc. You have to set infill to 0. Thin walls have been a subject in the forum before, e.g. http://umforum.ultimaker.com/index.php?/topic/3044-problem-with-stretchlet-stl, maybe you will find other threads too.

 

[IRobertI 428]

Could you upload the model you used as well?

 

[dipicorg 1]

If I change the Shell a little bit, it works great: (just 0.06mm added) Now I know, there are Limits, where Cura adds the missing Shellthickness to the only printed Wall.... (>=0.46mm)

 

http://www.dipic.org/TestBox_460.stl

 

 

[gr5 900]

Alternatively you could tell cura your nozzle was .39 or .38 and it should be fine.

 

[Daid 274]

Is this a desired Behaviour or a Bug?

 

Cura currently only does fully enclosed contours. With thin walled sections it cannot lay a contour and sometimes will refuse to print anything for that section. I have no plans to change this behavior, as the problem is difficult, and there are only a few edge cases where it is a problem.