The word "servo" comes from the Greek word for "slave". "Servo motor" can be understood as a motor that absolutely obeys the control signal: before the control signal is issued, the rotor is stationary; when the control signal is issued, the rotor immediately rotates; when the control signal disappears, the rotor can stop immediately.
A servo motor is a micro motor used as an actuator in an automatic control device. Its function is to convert an electrical signal into the angular displacement or angular velocity of the rotating shaft. A servo motor, also known as an actuator motor, is used as an actuator in an automatic control system to convert the received electrical signal into an angular displacement or angular velocity output on the motor shaft.
Working principle of servo motor
A servo system (servo mechanism) is an automatic control system that enables the output controlled quantity such as the position, orientation, and state of an object to follow any changes in the input target (or given value). The servo mainly relies on pulses for positioning. Basically, it can be understood in this way: when the servo motor receives one pulse, it will rotate the angle corresponding to the pulse, thereby achieving displacement. Because the servo motor itself has the function of sending pulses, the servo motor will send a corresponding number of pulses every time it rotates one angle. This forms an echo with the pulses received by the servo motor, or a closed loop. In this way, the system will know how many pulses have been sent to the servo motor and how many pulses have been received. In this way, the rotation of the motor can be controlled very accurately, thereby achieving precise positioning, which can reach 0.001mm.
