1. The servo mainly relies on the pulse to position, basically it can be understood in this way, the Mitsubishi CNC system repair servo motor receives 1 pulse, it will rotate the angle corresponding to 1 pulse, and then complete the displacement, because the servo motor itself has the function of announcing the pulse, so the servo motor rotates an angle for each angle, it will announce the corresponding number of pulses, so that the pulse accepted by the servo motor forms an echo, or called a closed loop, so that the system will know how many pulses are sent to the servo motor, How many pulses are collected together, so that you can accurately control the rolling of the motor, and then complete the accurate positioning, which can reach 0.001mm.
DC servo motors are divided into brushed and brushless motors. The brush motor has low cost, simple structure, large starting torque, wide speed regulation, easy control, and demand protection, but the protection is convenient (change the carbon brush), electromagnetic interference occurs, and there are requirements for the environment. Therefore, it can be used in cost-sensitive general industrial and civil applications.
The brushless motor is small in size, light in weight, large in output, fast in response, high in speed, small in inertia, smooth in rolling and stable in torque. The control is complex, easy to complete intelligence, and its electronic commutation method is flexible, which can be square wave commutation or sine wave commutation. The motor is protection-free, high efficiency, low operating temperature, low electromagnetic radiation, long life, and can be used in various environments.
2. The communication servo motor is also a brushless motor, which is divided into synchronous and asynchronous motors. Large inertia, low maximum rolling speed, and rapid decline as power increases. Therefore, it is suitable for applications with smooth operation at low speeds.
3. The rotor inside the servo motor is a permanent magnet, and the U/V/W three-phase electricity controlled by the driver forms an electromagnetic field, and the rotor rolls under the action of this magnetic field, and the encoder of the motor responds to the driver with a response signal, and the driver adjusts the angle of the rotor rolling according to the comparison between the reaction value and the target value. The accuracy of the servo motor is determined by the accuracy of the encoder (number of lines).
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