3DPrinting

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3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.

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Sometimes fewer walls are better (sh.itjust.works)

submitted 9 months ago by p1mrx to c/[email protected]

20 comments fedilink hide all child comments

I think I found a counterexample to the common wisdom that more walls always create a stronger part.

The pictured S shape is 1.5mm thick, so printing with 2 walls leaves no room for infill. My testing wasn't very rigorous, but it seems that the hybrid structure of walls + rectilinear infill is 10-20% more rigid than walls alone. The infill adds strength by cris-crossing between adjacent layers.

I think it's fine to include a concentric top/bottom layer, but multiple identical layers weaken the part. I also tried 0 walls (infill only) and that was garbage.

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[–] [email protected] 0 points 9 months ago (1 children)

The 2 walled hook is closer to solid plastic too, which should give it the most bonded surface area per layer and make it stronger overall.

[–] [email protected] 2 points 9 months ago (1 children)

The bond between layers or the walls is a lot weaker than just solid material.

[–] [email protected] 1 points 9 months ago

Sure, but stronger than just infill to walls.