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slic3r / Slic3r

Open Source toolpath generator for 3D printers
https://slic3r.org/
GNU Affero General Public License v3.0
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Small areas infill overlapping with infill every n layer #5131

Open mieszkokl opened 2 years ago

mieszkokl commented 2 years ago

Describe the bug Using infill every n layer option small areas where larger infill doesn't fit, smaller one is used. The problem is that on some layers these infill overlaps. You can see examples on attached screenshots. I would be grateful for info if it's only a configuration issue or maybe a bug in the code and if it's a bug any hint about how to fix it would be very helpful.

To Reproduce Steps to reproduce the behavior:

  1. Open the stl file from attached archive
  2. Load the print ini configuration from attached archive
  3. See the gcode output for the model - it will be like shown on screenshots above

3D Model and Slic3r Configuration Export issue_config_and_model.zip

Expected behavior I expect the infill generated with thinner extrusion doesn't overlap with the thicker one.

Screenshots slicer_issue slicer_issue_2 image

Desktop (please complete the following information):

mieszkokl commented 2 years ago

I would be grateful for a hint where I can find the logic responsible for that in the code, so I can fix it myself.

supermerill commented 2 years ago

smell like a thin_wall / gapfill bug.

mieszkokl commented 2 years ago

I found out that's the code in LayerRegionFill.cpp lines from 126-151 (master branch) that is responsible for making this extra filling. The issue is only on layers where normally there is no infill because of the "infill every n layer" setting. On layers where we have both normal infill and this extra one they're correctly placed. Do you have any idea what went wrong?