Servo

A servomechanism, usually called a servo is like a motor, expcept that it’s axle goes to a specific place instead of just spinning. They are connected to the robot controller through a PWM interface.

Continuous Rotation Servo

A Continuous Rotation Servo is a servo capable of rotation past 360°. This allows one to use a continuous rotation servo as a small motor. Such servos are capable of only full forward, stopped, or full reverse motion. Most servos of this type are controlled by a PWM signal whose width controls the rate of turn.

Standard Rotation Servo

Most servos are capable of only 90, 180, or 270 degrees of rotation. Such servos are used for accurate angular positioning of a mechanism. Most servos of this type are controlled by a PWM signal whose width controls the angular position of the servo.