Closed MartinMajewski closed 1 year ago
Btw.: this glitch appears as shown in the screenshots with the 0.6mm nozzle profile. Changing the nozzle profile to 0.4mm just changes the expression of the glitches but does not remove them.
Here is the wrongly produced gcode (on a newer version of the model):
Thank you for reporting this issue. Your issue is caused by an issue in the Boost Voronoi diagram generator library that Arachne uses. The boost Voronoi diagram generator is producing a non-planar Voronoi diagram that isn't correct. It should happen only in very rare cases, but we are investigating this issue.
For now, you can workaround this issue by any of those two workarounds:
The G-code line that you mentioned is correct. G-code specification allows instead of -0.05 to produce just -.05, and printers process it correctly. We started emitting those G-code lines in PrusaSlicer 2.4.0 release.
Here's an extreme example which I assume is caused by the same thing:
Rotation by 1° did solve it for me!
If you want to test with it, here's the file: 120mmFanDesiccant.zip
Default prusament petg profile Default prusa mini+ 0.6mm nozzle profile Default settings with arachne
PrusaSlicer Version: 2.5.0+win64 Build: PrusaSlicer-2.5.0+win64-202209060714
Operating System: Windows System Architecture: 64 bit Windows Version: Windows 10 (build 19044), 64-bit edition Total RAM size [MB]: 34,301MB OpenGL installation GL version: 4.6.0 NVIDIA 516.59 Vendor: NVIDIA Corporation Renderer: NVIDIA GeForce RTX 3070 Ti/PCIe/SSE2 GLSL version: 4.60 NVIDIA
+1, spotted this in one of my parts with x/y planar "thin" walls. Its producing infill in these areas and then producing strange perimeters that exit the model on top of the infill. Subscribed.
These problems related to the Voronoi diagram generator are fixed in the next release 2.6.0. Here, I attach pictures and close the GH issue as resolved.
Description of the bug
Printing features that are in the range of two perimeters printed only (no infill needed, the wall-thickness is only two perimeters), mysterious glitches appear. These glitches show as perimeters and overhanging perimeters where none should be.
I have attached pictures of the object and the sliced result.
Project file & How to reproduce
IssuesWithMysteriousPerimeters.3mf.zip
Please find attached the project file.
Checklist of files included above
Version of PrusaSlicer
2.5.0 - Release Version
Operating system
macOS 12.5.1
Printer model
Prusa MK3S