Different filament for supports and brim

Bambu Lab H2 Series
1

I print pretty much only PLA - currently on a H2D and soon to be a H2C (once upgraded).

My right nozzle has all my PLA filament colours fed via 3 AMS 2 Pro’s.
My left nozzle has a single roll of PETG fed via a AMS HT.

Havent tried it yet, but I intend to use the left PETG feed for support interfaces, and the right for all PLA, which should work well when I upgrade to Vortek system.

I know how to enable PETG support interfaces in BambuStudio for the PLA model - but is there a way to use PETG for the brim as well? Or is that not recommended?
Sometimes I find the brim sticks too well and doesnt come away from the model clean enough - especially if there are small parts to the model etc, so thought PETG would be a better choice for the brim as well as support interfaces?..

2

As far as I know, brim is always printed with the first filament that will be used.

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i think even if it would be possible, it would result in problems because of the different heatbed temps between PLA and PETG

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May I ask why you would use brim in a different filament than the model? The sole purpose of the brim is to increase adhesion to the build plate. Using the support material for this purpose would be counterproductive.

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Yeh good point.
I just find the brim doesn’t always remove cleanly - maybe I need to play with the settings, or pick up a deburring tool!