The core cable rack is driven by a single electric motor and a gear wheel as well as a synchronous shaft so as to drive each core cable to rotate.

芯线架子由单个电机，采用齿轮与同步轴传动，带动每根 芯线转动；

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Designed to be lightweight and cheap to produce, the robotic bicep upgrade uses a (mostly) aluminum frame, battery-powered DC motor, cable drive system, racket braking and thumbstick controller for movement, with a BeagleBone board supervising the electronics that pull it all together.

ENGADGET: UPenn's TitanArm exoskeleton prototype makes light work of heavy lifting (video)