Weighted Yaw Base Tub
The foundation of the 'MG90S Animatronic Desk Lamp Robot' kit. It is a round tub, 120 mm OD x 40 mm tall, and the turntable skirt centres on a built-in thrust rim: a flat annulus from r=54 to r=60 at Z=40 with a 45° chamfered ledge underneath. Two 10 mm posts hold the slotted micro-servo plate on M3 heat-set inserts, so an MG90S or SG90 yaw servo hangs in a clear bay. A ring trough at r=41–57 holds steel washers or BBs as ballast, and a 14 x 10 mm notch lets the cable out.
robotics kit mg90s turntable