I'm trying to slice an STL file with 0.4mm layer height,

I’m trying to slice an STL file with 0.4mm layer height, with gyroid infill with the Slic3r Prusa Edition. The outer perimeters show a height of 0.4mm; however, the infill and the first top layer has a height of 1mm. This causes the top layers to crash into the head and the print gets spoiled.

I’m using an E3D volcano with a 1mm nozzle. Combine infill is set to 1 - so not sure what’s happening here.

Settings and STL are here:
https://github.com/prusa3d/Slic3r/files/2252516/Archive.zip

Any help appreciated

You may have actually found a legitimate bug in Slic3r. I’d try these settings in standard Slic3r, see if they can be reproduced, and then file a bug report on github here: https://github.com/slic3r/Slic3r

Additionally, if there’s a github for prusa edition, file a bug report there as well. There shouldn’t ever be a time where a slicer issues your hot end to be at a position lower than something already printed.

@ThantiK filed a report on the Prusa Edition github earlier today. https://github.com/prusa3d/Slic3r/issues/1112
It seems that bridges (or the first top layer in this case) are always extruded with the height of the nozzle. In my case, it got exaggerated, since I have a 1mm nozzle.

Looks like there are two issues:

  1. with the gyroid infill - honeycomb works as expected
  2. with the first “bridge” layer