As it says in the title, if you have multiple objects, do print by object, the slicer will not generate a prime tower for the object that has been painted to be multicolor.
The question is what would be the expected behaivor. As for print by object it restarts at 0-z should it generate a prime tower for each object? And where they are placed not interfering with others. Most like that this is the reason that it is currently not implemented.
I’m running into the same issue. I want to print 4 objects by object with support being different material. I’d say the expected behavior would be to have a prime tower for each object and the prime tower place near each object so no collisions with other objects. Wish they would implement this feature.
Hello community,
I think it’s intend, it’s not a bug. I’ve launched a print for 2x objects, one was 2 colours and I’ve stopped the printer thinking that the tower was in line with the second object, thinking that will crash into the tower when prints the second object. Even that the settings was enabled, there was no tower. Think about it. There are a lot of circumstances that something will go wrong, the printer head could crash in the tower. There is one scenario, like mine, 2x object one multicolour, and the other just one color. If you print the first object (multicolour) way back of the print plate, near the tower and the second one in front, everything should be fine. Imagine if the second object would be multicolour too… I think that this is a fail-safe from the Bambu Lab, and it from my point of view it is the correct approach. Thank you!
I have this issue when printing one object with color A and then another object with color B, the nozzle is not primed after the color change for the second object and so the result is a gap in the object start.
If not a Prime Tower, then perhaps a Prime Line for the second object when it changes filament so the nozzle is properly primed.
Just my 2c
Maybe generate a tower inside the “safety zone” of each part, of course affecting the size of said zone. Sure, a drawback might be that the primetower collapses (mixing PETG/PLA; …), but I only had this happen once or twice since I’m printing multi-material, so I don’t think that this is such an issue. how to code this, on the other hand, I have no idea…
Two and a half years later and this bug still exists. 
Expected behavior is what’s described above.
Bambu Studio often messes up the prime tower location when it’s just one object. In that case, it generates an error about object collisions. Importantly, when this happens, you can
2026 and this bug still exists. Is there anyway to make the devs more aware of this bug?
Thanks
Creating a GitHub issue is probably the best way.
Just updating here that this bug still looks to exist: link to issue submitted on Jan 19th:
issue 9446 on the bambu studio github (not allowed to post link)
Does any slicer have this feature?
If 0-1 of them do, it usually means no-one can figure out how to write the code, or someone has a patent. If 2+ have it, then it usually means the ones that do not have it must to “encouraged”.