[Explainer] Humanoid Actuators: Motors, Gearboxes, Torque and DoF—Atlas, Figure and Optimus Compared
Understand how motors, transmissions and sensors become humanoid joints. This guide explains brushed DC versus BLDC, strain-wave versus planetary gearing, and motor versus joint torque, then compares what public sources actually establish about Atlas, Figure and Optimus without mixing generations or counting methods.