Slicing of 0.15mm layer height issue

[rcfocus 0]

Hi Experts,

 

I probably found a Cura-3.4.1 slicing bug. I am building an Ultrascope (http://www.openspaceagency.com/ultrascope), a printed telescope. The STL files are provided the Ultrascope team. The first STL file is recommended to be printed with layer height 0.15mm. But it fails to print. Look at the sliced layers, some part of the first few layers is missing. But when I use 0.1mm layer height, it is correct. The original STL file and screen snapshots of both 0.15mm and 0.1mm are attached. The right-hand side of 0.15mm has the issue.

1-Hexagon-1.stl

[burtoogle 501]

Hi @rcfocus, I had to use the auto-orientation tool to get the part to lie flat. When I did that, it appeared to slice OK using a 0.15 layer height, here's the first layer:

 

[rcfocus 0]

Thanks smartavionics, the auto-orientation extension works. This workaround will save me a lot of time.