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prusa3d / PrusaSlicer

G-code generator for 3D printers (RepRap, Makerbot, Ultimaker etc.)
https://www.prusa3d.com/prusaslicer/
GNU Affero General Public License v3.0
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Gear Bearing has connected external perimeters when arachne generator is used #13279

Open jiri-jirus opened 3 weeks ago

jiri-jirus commented 3 weeks ago

Description of the bug

Arachne generator creates unwanted bridges between parts of "gear bearing" prusa sample object.

Project file & How to reproduce

Try to slice gear bearings sample stl on prusa slicer 2.8.0. layer height 0.10 to 0.20 tried and affected by this issue with arachne. classic generator works ok gear_bearing_classic gear_bearing_arachne

Gear_Bearing.zip

Checklist of files included above

Version of PrusaSlicer

2.8.0

Operating system

Windows 10

Printer model

Ender 3 @ 5 drivers with Matrix Extruder

jiri-jirus commented 3 weeks ago

here screenshot with arrows pointed on problematic parts gear_bearing_arachne2

neophyl commented 3 weeks ago

Change the slice gap closing radius from the default of 0.049. I changed it to 0.005 and then the perimeters are not merged. Seen this lots of times with gear prints and tolerance test prints, both here and the Prusa forums.
image

jiri-jirus commented 3 weeks ago

well, when I used just "Split to parts" on the STL object, it stopped doing this merging mischief.