Ultralight Truss Line Follower Chassis

Prompt en inglés (Optimizado estructuralmente con cerchas y radios): Design a structural ultralight line follower robot chassis optimized for minimum weight and maximum bending stiffness in 3D printing. Use a tapered Y-frame geometry with 6 mm interior fillets at all junctions to prevent stress fractures. Set base plate thickness to 1.4 mm with 3.5 mm high perimeter stiffening ribs (1.6 mm thick) along all outer edges. Total length 140 mm, rear motor bridge width 90 mm and 35 mm deep, tapered central neck narrowing from 42 mm at the rear to 36 mm at the front (87 mm long), and front sensor bar width 80 mm and 18 mm deep. Include the following features: 1) On the front sensor bar, cut a centered horizontal mounting slot 68 mm long by 3.2 mm wide with rounded ends, 7.5 mm from the front edge, for M3 screws. 2) Behind the slot, cut a centered rectangular cable hole 28 mm wide by 8 mm long with 2 mm rounded corners, 18 mm from the front edge, flanked by two longitudinal 3.5 mm high stiffening ribs connecting the front bar to the neck. 3) Two 2.5 mm holes spaced 15 mm apart horizontally, centered 34 mm from the front edge for a plastic ball caster. 4) Two pairs of 2.2 mm mounting holes spaced 10 mm apart along the length axis, positioned 8 mm inward from the left and right rear edges and 15 mm from the rear edge for N20 motor brackets. 5) Cut symmetric triangular truss cutouts in the rear bridge and rear neck leaving 3.5 mm structural margins. Flat bottom face for support-free FDM printing, all dimensions in millimeters.

Parameters

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