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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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Brim being printed with wrong extruder on XL #12784

Open fscheps opened 5 months ago

fscheps commented 5 months ago

Description of the bug

I needed to print multiple objects, half of them in one color, and the other half in another color. But for some reason the brim of the objects on the left is being printed with the extruder of the right. Even if I have selected different extruders for different objects. Quite odd. DualPrint.3mf.zip Brim_Error

Adding the 3MF, a screenshot and a picture of the outcome, hope it helps to find a solution.

Thank you! 😉 Transparent_and_Red

Project file & How to reproduce

DualPrint.3mf.zip

Checklist of files included above

Version of PrusaSlicer

Version 2.7.4+MacOS-arm64

Operating system

14.5 (23F79)

Printer model

Prusa XL dual toolhead

fscheps commented 5 months ago

This print finished, and for whatever reason on one layer, the extruder with red color also printed on the extruder which was printing in transparent. Very odd.

image

upgrayed13 commented 3 weeks ago

I also have noticed the same issue using Prusa Slicer Version 2.8.1+win64 with a Prusa XL with 5 print heads. In my case, I set the Perimeter extruder, Infill extruder, and Solid infill extruder to use extruder 2, while Support material/raft/skirt extruder and Support material/raft interface extruder were set to extruder 4.

I expected the brims to use extruder 4, but there's nothing I can do to change them to use extruder 2. I've tried enabling the brim globally, as well as for each individual object, but both yield the same results of using extruder 2.

Interestingly, the slicer does use extruder 4 for the supports, so it's only the brim that's effected. This further leads me to believe this is a bug.

My best guess for what is going on is that there is a bug where the slicer isn't actually using the Support material/raft/skirt extruder setting and is always leaving at the default (2) or setting it to 0 (i.e. use the "current" extruder), however that's just a guess.

upgrayed13 commented 3 weeks ago

If I'd have to guess, this issue is related to #12752.