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Servo motors are used for robotic applications that require precision positioning. Before diving too deeply into the ways servos are used in robotics, it’s helpful to first learn about the basic function and form of these critical components of motion control.


What Is A Servo?

At its most elemental, a servo is a precise and powerful way of converting rotational motion into linear motion. A servo (or servo motor, as it’s sometimes known) consists of:


The Electronic Assembly, which consists of an AC or DC electric motor, a controller board, and a potentiometer.

The Case, which is the plastic housing for the motor and other components.

The Drive Gears, which reduce the motor’s high-speed output to a lower speed, higher torque servo output.

The Output Spline, which is attached to the output shaft and is the final interaction point between the servo and object of the motion it is creating. A good example is a servo in a remote-controlled airplane. The output spline of the servo might be attached via a control rod to a control surface such as an aileron or rudder. The motion of the servo would, therefore, cause an equivalent movement of the airplane itself.

How Does A Servo Work?

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