What difference between stepper motor and servo motor？

Why large UV printer needs to use servo motor, Now let’s look at the difference between the stepper motor and servo motor:

What are the defects of the stepping motor? The price is cheap, the control is simple, cannot operate precisely; The power itself is small, resulting in slow speed. Low level of technology, Plus the poor quality of the parts, the life of the servo motor is only one third.

Servo means “follow” control signal. The basic concept of the servo is accurate, accurate and fast positioning. The role of the server to the motor is to provide a controllable voltage, a control voltage signal with a 90-degree difference between the voltage phase and the excitation voltage. The structure of the servo motor is different from that of ordinary motor, with encoder feedback closed-loop control, fast response, and accurate positioning.

What are the advantages of servo motors?

1. Precision: closed-loop control of speed, position, and torque.
2. Speed: the rated speed of the servo motor can reach 2000~3000.
3. Adaptability: strong overload resistance, able to withstand three times the rated torque.
4. Timeliness: the dynamic time of motor acceleration and deceleration is short, generally within tens of milliseconds.
5. Stability: the operation is stable at low speed, and the stepping operation similar to the stepping motor will not occur at low speed.
6. Comfort: heat and noise are significantly reduced.
7. Operation: the servo motor stops running when the power is off; The stepping motor is unable to stop immediately due to some inertia, there will be out of step phenomenon.