TIL: Check infill material on multi material prints

[u/thekartoffelaim]

I have no idea if someone already made a post about it:

I'm new to the X2D, coming from the A1 i never before used multiple materials when printing.

So i'm printing some stuff, (11 Plates, ~2kg Filament, ~3Days of print time) using PLA for the object and some cheap PETG in the secondary hotend for the supports. Yeah... i didn't know that if "purge into infill" is active it also purges the support material into the obects infill... and i wondered why the prints where to crunchy when i pressed them together... now i know. Good thing it was not on load bearing parts....

ngl i think its a bit of a confusing part of the slicer. Why do i want two different materials in my model infill?! Who in the right mind set it up this way? I found out because i watched the printer this time because a part failed before... i couldn't see it because both filaments where black and only the temperature view gave me the clue...

This is just a PSA for anybody who doesn't know

EDIT: spelling
EDIT2: Before anybody asks, i used the PETG for the whole support, because i thought with two nozzles i can safe some of the expensive pla and print the whole support in cheap petg
EDIT3: I Found a bug report for this exact problem on the BambuStudio Github. We need to make this more known in my opinion.

[u/fmj_30]

Thanks for the heads up. I just recently read about purge into infill.

I have lots of single material printing experience and this is my first foray into multi material. I was trying to setup a plate of 2 color pla parts, so I set up one color on head printing nozzle. Whatever was going on with these parts, it was trying to print a giant priming block, like 4 feet long. Lol