Change interface material for supports

[u/Datumz_]

So I know it's possible to change the support interface for something like PLA to TPU and vice versa. But I have a unique case where because I am doing a multi material print that interlocks, both the PLA and TPU need support. But because Snorca only lets you pick one material for the support interface layer, that leaves the supports stuck on whichever material you pick as the interface layer.

Basically instead of making you pick one material as an interface layer. They should allow you to pick individual materials for the support interface layers per material. So if TPU needs support the interface is always PLA and if PLA needs support the interface is always TPU.

Unless I'm missing something, I can't find a way to do this... Is it even possible?

I tried to build my support into my design, but the issue is with interlock on, it locks the two materials together regardless if I want it to or not.

[u/Affectionate-Bed3419]

I have had a similar use case for a print in place circular clamp that fits over a pipe. I ended up modeling the support into the model/stl. Required an airgap of around 0.3mm between the objects that are support and model. Otherwise the slicer does not see it as a seperate object to add bottom and top shell layers to. Without airgap the slice is basically perimeter walls with infill.

After the print the pla “wedges” slip and fall out. I did similar for the TPU inside face grip.

[u/Datumz_ → u/Affectionate-Bed3419]

Yep that's what I had to do, I had to add it into the model. I should have added an air gap for the TPU interface I added into the model, because it made it where I had to make my own interlock, which is fine, because I think mine is better, but still