Operation and Control of the servo motor used in CNC machines

Abstract

Computer numerical control machine provide automatic and precise motion control via special programming language called G-code to its elements such as work table and tool spindle with the aids of servo motor and the stepper motor. the operation of the stepper motor depends on the digital signal is sent from the controller to the motor in the form of pulses as to rotate the motor which is converted to linear movement by the lead screw, As the distance moved by the slide and the feed can be accurately controlled by the computer numerical control machine control system. Servo motor which we are focused to study, the servo motor requires both positional and velocity feedback, which means that the actual position and velocity of the slideway is continuously compared to the digital signal that is being sent out by the controller.