Strange behavior with the tree support

[DokuKaefer]

Bambu Studio Version

1.7.0.53

Where is the application from?

Bambu Lab github releases

OS version

Windows 11

Additional system information

No response

Printer

Bambu Lab X1C

How to reproduce

Load the following Backing peg.stl to a new project: https://www.printables.com/de/model/119811-skadis-universal-peg/files

Choose option "On build plate only"

Actual results

As you can see on the screenshot, the support is not applied to the object facing forward.

As soon as the option "On build plate only" is deactivated. The support is also added to the front object. But still different to the other ones.

With Bambu Studio version 1.6.2 it is even worse.

Expected results

The tree support should be correctly applied to all objects in the same way.

Project file & Debug log uploads

https://www.printables.com/de/model/119811-skadis-universal-peg/files

Backing peg.stl

Checklist of files to include

• [ ] Log file
• [ ] Project file

[DokuKaefer]

Another example. I know the printer can do this without support. I just want to point out the bug here. https://www.printables.com/de/model/121329-skadis-screwdriver-rack/files

Bambu Studio 1.7.0.53

One is ok, the other same hole is without support.

The back would be better for support.

And if you change the orientation on the plate, will it get better with the support, but now the outer holes would be missing.

In this orientation the outer holes would be missing again and the third hole from the left.

The best orientation is diagonal.

[RyanEwen]

Sounds possibly related to https://github.com/bambulab/BambuStudio/issues/2008

[tangketan]

The generation of tree nodes is discrete and depends on orientation. It is not isotropic. I'll need a little more time on this... @RyanEwen Yes, it's related, and more complex because the overhang here is round, there are no corners at all...

[tangketan]

@DokuKaefer Automatically solving this issue is difficult, but you can manually set a smaller branch distance

[PowerChaos]

i going add it to this post here

Orca Slicer 1.6

Bambu Studio 1.7

so overhangs of 85 degree get ignored and it does overhangs on places it is not needed

hopely this can help

Greetins from PowerChaos

[tangketan]

@PowerChaos Would you please share the 3mf?

[PowerChaos]

Bunny Full.zip

@PowerChaos Would you please share the 3mf?

i attached the file , no idea where i got it from also this version is the assembled version , i got also the unassembled version in 11 parts in the end the print was succesfull as it does not need support at all ( but benefit from it under the ears/chin )

Eather way , same settings and so much difference , so somehting is wrong with the calculation of hte supports xD

[tangketan]

Bambu Studio 1.7 has just been released, and the default tree supports are good enough to me.

[DokuKaefer]

@tangketan i have now the final version 1.7.1 and was about to print the following model: https://www.printables.com/de/model/433736-govee-temphumidity-sensor-model-h5179

Version 1.7.1

Version 1.6.2

[tangketan]

@DokuKaefer This is a bug with small overhang removal. I'll look into it. For now you can disable "remove small overhangs" option to workaround.

[BambulabRobot]

This issue has been marked as inactive due to no response for 90 days.