[4.2.1] Supports cross the brim

[Liger0]

Application version
4.1.2

Platform
Win10 x64

Printer
Custom dual extruder

Reproduction steps
Use tree supports and brim

Actual results
They cross each other creating blobs and eventual fail

Expected results
there should be no support where there is the brim

Additional information

brim and support crossing.zip

[Vandrasc]

Hi @Liger0 , is the support brim enabled? Then the support should indeed be generated above the brim, for better adhesion of the support.

Also, cool model, thank you for sharing :)

[Liger0]

Hi there. What you see in the preview is only the first layer, not the second.
On the first layer, different features cross each other, thus the nozzle clogs and the print fails, also the nozzle drags and moves out the first layer.
I never printed that model nor I intend to, I just use it because it is a simple yet complex enough model that helped me to test out settings and find multiple cura bugs until now.
The support brim is enabled, and the project is shared under the image.

[Ellecross]

Will it help if you disable the Support Brim?

If you do, it will have only the support in the brim and one line with extruder 1 at the outermost.

[Ghostkeeper]

I think the actual problem here is that you have both Tree Support and ordinary Generate Support enabled. This will generate the support twice which is not generally what you want and causes overextrusion.

We're planning to remove this possibility.

[Vandrasc]

We created a ticket internally for removing the possibility of enabling both type support, devs for our reference see CURA-6711.

[GregValiant]

I'm cleaning house.
Is this still a problem with current Cura versions (5.8.0 and up)? Can I close this?

[github-actions]

This issue has been automatically closed because there has been no response to our request for more information from the original author. With only the information that is currently in the issue, we don't have enough information to take action. Please reach out if you have or find the answers we need so that we can investigate further.