SERVO system is an automatic control system which can make the object's position, orientation, state and other output controlled quantity follow the input target (or given value) . The servo mainly depends on the pulse to locate, basically can understand like this, the servo motor receives a pulse, will rotate a pulse corresponding angle, thus realizing the displacement, because, the servo motor itself has the function of sending out the pulse, so the servo motor sends out a corresponding number of pulses at each angle of rotation, thus forming a corresponding, or closed-loop, response to the pulses received by the servo motor, so that the system knows how many pulses are sent to the servo motor At the same time, how many pulses back, so that can be very accurate control of the motor rotation, thus achieving accurate positioning, can achieve 0.001 mm M. The rotor inside the AC servo motor is a permanent magnet. The U / V / W three-phase electric field controlled by the driver forms an electromagnetic field. The rotor is driven by this magnetic field, and the encoder of the motor feeds back the signal to the driver The actuator adjusts the rotor rotation angle by comparing the feedback value with the target value. The accuracy of the servo motor is determined by the accuracy of the encoder (number of lines) .
