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Servo and receiver connections A diagram showing typical PWM timing for a servomotor. Servo control is a method of controlling many types of RC/hobbyist servos by sending the servo a PWM (pulse-width modulation) signal, a series of repeating pulses of variable width where either the width of the pulse (most common modern hobby servos) or the duty cycle of a pulse train (less common today ...
The servo is controlled by three wires: ground, power, and control. The servo will move based on the pulses sent over the control wire, which set the angle of the actuator arm. The servo expects a pulse every 20 ms in order to gain correct information about the angle. The width of the servo pulse dictates the range of the servo's angular motion.
Other examples are fly-by-wire systems in aircraft which use servos to actuate the aircraft's control surfaces, and radio-controlled models which use RC servos for the same purpose. Many autofocus cameras also use a servomechanism to accurately move the lens. A hard disk drive has a magnetic servo system with sub-micrometer positioning accuracy ...
A servomotor (or servo motor or simply servo) [1] is a rotary or linear actuator that allows for precise control of angular or linear position, velocity, and acceleration in a mechanical system. [ 1 ] [ 2 ] It constitutes part of a servomechanism , and consists of a suitable motor coupled to a sensor for position feedback and a controller ...
The number of servos in a model determines the number of channels the radio must provide. Typically the transmitter multiplexes and modulates the signal into pulse-position modulation. The receiver demodulates and demultiplexes the signal and translates it into the special kind of pulse-width modulation used by standard RC servos and controllers.
Novak Electronics, Inc. of Irvine, California was a manufacturer of radio control electronics. Founded by radio control enthusiast and electronics engineer Bob Novak, Novak Electronics originally manufactured servos. Novak Electronics was primarily known for its line of electronic speed controls for electric land vehicles and boats.