Custom 3D-printed biped robot: topology-optimized shins and printed cycloidal gearboxes

TinfoilTricorn · x · 2026-09-03

Cosmos Network shared a fully custom 3D-printed biped robot with notable engineering choices: articulated legs use a servo horn plus bearing on the opposite side to avoid skew under load (2-10cm steps), topology-optimized shins and 3D-printed cycloidal gearboxes cut inertia, and motors are cocooned for impact resistance. A reproducible blueprint for hobbyist legged robots.

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