https://curiositium.com/tag/non-planar-slicing/Recent content in Non-Planar-Slicing on The CuriositiumHugoenThis work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.Sat, 25 Apr 2026 00:00:00 +0000https://curiositium.com/fixing-3d-printings-weak-spot-with-curved-layers/Sat, 25 Apr 2026 00:00:00 +0000https://curiositium.com/fixing-3d-printings-weak-spot-with-curved-layers/<p>If you&rsquo;ve ever snapped a 3D printed part, you probably noticed something suspicious: it didn&rsquo;t break randomly. It broke cleanly along a layer line, like a piece of shale splitting along its sediment layers. That&rsquo;s not bad luck — it&rsquo;s baked into how FDM printers work. And there&rsquo;s a fix quietly making its way from research labs into open-source slicers: printing in curved layers instead of flat ones.</p> <h2 id="a-stack-of-welds-not-a-solid-part">A stack of welds, not a solid part</h2> <p>A fused deposition modeling (FDM) printer builds objects by extruding molten plastic in flat, horizontal layers, one on top of another. Within a layer, the plastic is a continuous extruded bead — strong stuff. But between layers, you&rsquo;re relying on a thermal weld: the fresh, hot layer has to partially re-melt the surface of the layer below, which has already cooled, so the polymer chains can diffuse across the boundary. That weld is never as good as the bulk material.</p>