How to disable support transition layers

[Manu]

Hi there,

I have a support problem (with 2-layer PLA interface) in a PETG-CF part. Using Bambu Studio 2.6.0.51

When the printer reaches the first support transition layer, printed lines between the support walls curl upwards rather than laying flat. This creates a bumpy surface, which negatively impacts the next transition layer and the final PLA interface. Part cooling at this point is low (20%, my 100% cooling setting for bridges is not triggered, what is weird), but I tested to manually forced it to 100% and the result was just a little better.

I suspect that I could fix this by printing the PLA interface directly onto the PETG-CF support walls, but I can’t find a way to disable those two transition layers in the settings—it seems like they’re hardcoded/added by default.

My current settings:

I’ve seen examples where this is possible:

Any help is appreciated

Regards.

[DarkStar_Hardware]

I had this same issue. I ended up using AI to write a post processing script to change the fan speed on these layers. I’m in the process of updating it right now to accommodate the X2D. (originally written for the H2D). As I step back into the project, I have found that the code is a bit clunky in that it doesn’t catch the support transition layer, but the support interface layers.

Regardless, an image of a working bit of code for this problem on the H2D is shown below. It wont let me upload my python script to this blog. This code goes into a python script and then you need to write a .bat file to point to it. There are plenty of videos online about how to write a post script for Bambu, or maybe just ask an AI assistant.