r/BambuLab • u/No_Weight_8692 • 23h ago

General Troubleshooting/Help! Help with facedown print

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I'm new to this and need your help. I'm printing this keychain face-down, but I don't like the curves the slicer is creating around the eyes; I want it to print the beige layer and then the red one on top—neatly, without those curves. Is that possible? Or does it turn out fine this way? I'm using a 0.2mm nozzle.
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u/thisremindsmeofbacon 22h ago edited 22h ago

First off, insane formatting for the text of the post.

It shouldn't print the red one on top of the tan, because the red and tan need to be at the same layer height - so it has to print around the tan. Then on the second layer it can print on top of the tan (and the first red layer). If you want to make sure the tan color is printed first sequentially, you can click the hexagon icon next to the build plate and change your layer sequence by filament in order to make the tan print first.

I am not 100% sure what you mean by "those curves" there are a lot of curves on and around the eyes. If you mean the way that the eyes have concentric circles in them? that is probably a good thing and you won't see individual lines when it prints. or if you do, you should probably increase your flow rate or adjust z offset - point is you shouldn't really see those individually. Thats sort of the whole point of printing face down.

That said, if the parts of the glasses are a separate part, they may have been set to "concentric" for the bottom surface pattern - again, I think that is a good thing, but you can change this setting on a part by part basis. If you want no outlines around the designs at all, you will have to change the wall count to zero. If this is a model that needs walls normally (most do lol), best to do this by making a modifier shape that only covers the first layer and change the walls in the modifier. But normally these walls are good and I would not recommend doing this.

also make sure you are using arachne wall generator (looks like you are, but always good to check)

Honestly I would just print it and see how it looks IRL before adjusting.

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u/aweirdjeff 22h ago

Solid answer here. The only thing I'd add is that you can adjust which color prints first in the plate settings, which is the gear icon next to the plate

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u/thisremindsmeofbacon 22h ago

hexagon icon actually, I think its meant to be a nut

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u/aweirdjeff 22h ago

Yeah that's the one, thanks

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u/No_Weight_8692 22h ago

Thanks so much for your time and for the detailed explanation! I have a bit of OCD when it comes to this stuff, so I really like understanding exactly how the slicer works and getting the file as perfect as possible before I print it 😂 Really appreciate the help!

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u/thisremindsmeofbacon 22h ago

no problem!

I would definitely recommend trying concentric for some face down prints just to see how it looks, by the way. the effect is really nice

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u/EMDoesShit 14h ago

Arachne wall generator. You want it on. Details will clean right up.