Servo motors are used in all machines where it is required to check the exact position of the shaft position and the engine speed. The servomotor is an electric motor with various types of measuring system and the servo drive is responsible for controlling their operation. Replacing a damaged servo motor in a CNC machine often involves the need for an axis homing process. The main symptoms of servo motor damage are: loud and uneven motor operation, drive communication error, encoder error, overcurrent error, information about exceeding the controller operating temperature. Servo motor repairs are a quick and effective way to restore production during machine failure.