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Sensible wall thickness and infill for tall walls? (lemmy.ml)

submitted 1 week ago by cyberwolfie@lemmy.ml to c/3dprinting@lemmy.world

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I'm printing some Gridfinity bins for some drawers, and one of them needs to be quite tall to fulfill its purpose (18u, ~130mm). I took a shortcut and generated one from this generator using the default wall thickness and printed using Prusament PLA. This resulted in the walls falling in on itself, and my second failed print.

In hindsight, considering the wall thickness of 0.95 mm, this seems pretty obvious to me now. I want to give it a second go, but beef up the wall thickness and make sure there's some proper infill between the outer walls to keep it stiff.

At the same time I don't want to waste too much filament, so I want to hit a sweet spot of sufficiently thin walls and sufficiently low infill percentage, while avoiding another failed print.

Anyone have good experience with these kinds of prints that could give some input on a rough estimate for what I should aim for here?

I am using Adaptive Cubic infill by the way, but for no other reason than that has become my default infill pattern after some previous suggestions made here.

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[–] cyberwolfie@lemmy.ml 1 points 1 week ago

Good lord no. Don’t do that. That would be a waste of filament and also cause a host of other problems for you.

Just to be clear, it is the "hoping to use infill to get some support" that your response is aimed at, right? Out of curiosity, what kind of problems could I be looking at for this?

In the meantime, I've been printing some smaller bins of about half the height of my problem where I increased the wall thickness of the model from the default 0.95 mm to 2 mm, and used 3 perimeters, which resulted in fairly sturdy walls.

Looking at the same bin with 2 mm walls without infill, and 3 mm walls with infill, there is barely any difference in material usage.