FJJWFP
commented
2 weeks ago This behaviour appears to still be present with the latest update (1.9.4.60) for the "default" and "organic" tree support, which does not appear to have changed. However, it no longer affects the "slim", "strong", and "hybrid" options. These options now use the correct top Z distance and vary the layer height for the support structure.
tangketan
Bambu Studio Version
1.09.2.57
Where is the application from?
Bambu Lab Official website
OS version
Windows 11 Pro
Additional system information
No response
Printer
Bambu Lab A1, Bambu Lab A1 mini
How to reproduce
On a fresh install of Bambu Studio using default configurations, import a part and enable support, change support style to tree support. Change support top Z distance. Independent support layer height is enabled by default.
The above images were taken at identical views with no changes made besides support type (Normal vs. Tree, both left as default settings). From the above images, it can be seen that with a layer height of 0.3, the normal support has a top Z distance of 0.2mm as per the setting, while the tree support rounded the distance up to 0.3mm, which is incorrect and results in poor overhangs.
In both cases, the independent support layer height options were enabled, but only the normal support appears to have a different layer height compared to the part, while the tree support layers are perfectly aligned with the part layer height.
Actual results
The distance between the support interface material and the part is always rounded up or down to the nearest part layer thickness, e.g. a part layer height of 0.3mm will cause all support top Z distance between 0.16 to 0.35 to be rounded back to 0.3mm.
This issue is present with all types of tree support from my testing, while normal support is not affected. I've also found that the independent support layer height appears to not work with tree supports, as no matter what settings, the support layer height is in sync with the part. Normal support varies layer height as expected.
Expected results
The distance between the support interface material and the part should change according to the setting, irrespective of the part layer height.
Project file & Debug log uploads
log.zip support test.zip
Checklist of files to include