Servo motor servo motor is also called the performance of the motor, its function is to convert the input voltage control signal for output shaft angular displacement and angular speed, driving control target. Divided into the dc servo motor and ac servo motor. Small make up next to tell everyone about the CNC why use ac instead of dc servo motor? First look at the characteristics of the ac servo motor, and look at its strengths, we can see why will pick it first, we'll look at the principle of the servo motor and servo motor called the performance of the motor, the effect is through the input voltage signal is converted to the viewpoint on drive only and angular velocity, makes the shaft work, ac motor's main strengths are the following: 1, the precision of high precision encoders, the orientation precision of the rotor rotation reach micron grade 2, rotational speed, to ensure high speed, a steady dynamic balance degree 3, adaptability, a short period of time more than three times of the moment to output current, to bring strong adaptation: 4 and more stable performance under low rotate speed, torque force is big, can ensure that stress doesn't slide or abnormal following error, timeliness: motor echo within tens of milliseconds, due to its structure, comfort: compared with synchronous motor, induction motor itself is less a lot of parts, making driving more solid, sound small CNC is attributed to high precision machine tool, is used to produce a variety of accessories and parts such as watches, mobile phones, computers, etc. Bring more precise servo ac function orientation degree, beautiful, make products and round not running form. Its most important significance is that the precision of fabrication, for high precision of aviation, space rockets, and precision medical equipment category plays a crucial effect on