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Brick-Interleaved Layers (www.youtube.com)
submitted 2 years ago by to c/3dprinting@lemmy.world
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3D prints still suffer from bad layer adhesion due to their 2.5D slicing and printing approach. I investigated if a novel slicing method that interleaves the layer could improve the strength of 3D prints.

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[–] 45 points 2 years ago

For anyone who prefers reading: https://www.cnckitchen.com/blog/brick-layers-make-3d-prints-stronger

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    [–] 29 points 2 years ago* (last edited 2 years ago)

    Jesus, in hindsight, this is such an obvious and great design trick to increase strength that I'm surprised it didn't become more popular earlier.

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    [–] 10 points 2 years ago

    Love his empirical testing and experimentation.

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    [–] 7 points 2 years ago (1 child)

    This makes a lot of sense. I could see this being used for printed buildings and it would be a cull circle.

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    • [–] [B] 6 points 2 years ago

    Here is an alternative Piped link(s):

    https://piped.video/watch?v=5hGm6cubFVs

    Piped is a privacy-respecting open-source alternative frontend to YouTube.

    I'm open-source; check me out at GitHub.

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    [–] 5 points 2 years ago (3 children)

    Now we just need half-width extrusions on the outer wall!

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  • [–] 2 points 2 years ago (1 child)

    The thumbnail shows a hexagonal tiling, which is like a brick-laying pattern but rotated 90 degrees, so the "half bricks" are on the top and bottom, not the sides.

    Maybe it would still work to orient the hexagons so the zig-zag part is on the walls, and then fill in the gaps with half-height half-width walls. Although "half" isn't exactly correct; the hexagons give you ugly trig numbers.

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  • [–] 1 point 2 years ago (1 child)

    You don't need any ugly trig. You can just use a magic number. The magic number in question is 0.8660254, which is the ratio between the width of the longways (point-to-point) to shortways (flat-to-flat) dimensions of a regular hexagon. If you need half of that, divide it by 2 afterwards.

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  • [–] 1 point 2 years ago (1 child)

    What is that? You do two half widths for each perimeter and it increases strength?

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  • [–] 4 points 2 years ago (3 children)

    Just an offhand idea. If you look at the print in the thumbnail, you can see that while this clever brick-interleaving has eliminated the straight lines along the xy plane, the Z axis still has straight lines. Eliminating that so you have a "brick-interleaving" in all axis seems the most optimal.

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  • [–] 1 point 2 years ago*

    Well you need either that or the video's idea. I think yours could be easier to implement and it requires fewer z-movements (and no reordering, can't remember if the video did that)

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