Chapter 2 Actuators and Drive Systems - MIT OpenCourseWare

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system. Figure 2.2.1 shows a schematic diagram of a single-axis drive system consisting of a DC motor, a gear head, and arm links1. An electric motor, such as a DC motor, produces a relatively small torque and rotates at a high speed, whereas a robotic joint axis in general rotates slowly, and needs a high torque to bear the load.

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