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How does the servo motor work in a CNC bending machine?

How does the servo motor in the servo CNC bending machine work?

Let’s talk about it below:

1. When to choose a DC servo system and what is the difference between it and AC servo?

Answer: DC servo motors are divided into brush and brushless motors.

The brush motor has low cost, simple structure, large starting torque, wide speed range, easy control, maintenance is required, but easy maintenance (change carbon brush), electromagnetic interference, and environmental requirements. Therefore, it can be used in common industrial and civil occasions that are sensitive to cost.

The brushless motor is small in size, light in weight, large in output, fast in response, high in speed, small in inertia, smooth in rotation and stable in torque. The control is complex, easy to realize intelligence, and its electronic commutation method is flexible, and it can be square wave commutation or sine wave commutation. The motor is maintenance-free, highly efficient, low operating temperature, low electromagnetic radiation, long life, and can be used in various environments.

AC servo motors are also brushless motors, which are divided into synchronous and asynchronous motors. At present, synchronous motors are generally used in motion control. They have a large power range and can achieve great power. Large inertia, low maximum rotation speed, and rapid decrease as the power increases. Therefore, it is suitable for low-speed and smooth running applications.

2. What should be paid attention to when using the motor?

Answer: Wuxi Shenchong feels that the following checks must be done before power-on and operation:

1) Whether the power supply voltage is appropriate (overvoltage is likely to cause damage to the drive module); the +/- polarity of the DC input must not be connected incorrectly, and whether the motor model or current setting on the drive controller is appropriate (don’t Too big);

2) The control signal line is connected firmly, and the shielding problem should be considered in the industrial field (such as using twisted pair);

3) Don’t connect all the wires that need to be connected at the beginning, only connect to the most basic system, and then gradually connect after it runs well.

4) Be sure to figure out the grounding method, or use floating without connecting.

5) Closely observe the state of the motor within half an hour of starting operation, such as whether the movement is normal, the sound and the temperature rise, and immediately stop and adjust if there is a problem.

3. Can I directly control the servo motor through communication?

Yes, it is more convenient. It’s just a speed issue. It is used for applications that do not require high response speed. If fast response to control parameters is required, it is best to use a servo motion control card, which generally has DSP and high-speed logic processing circuits on it to achieve high-speed and high-precision motion control. Such as S acceleration, multi-axis interpolation and so on.

4. Is it good to use a switching power supply to power the stepper and DC motor system?

It is generally best not to, especially the high torque motor, unless a switching power supply that is more than twice the required power is selected. Because the motor is a large inductive load when it is working, it will form an instantaneous high voltage on the power supply terminal. However, the overload performance of the switching power supply is not good, it will protect the shutdown, and its precise voltage regulation performance is not needed, and sometimes it may cause damage to the switching power supply and the driver. You can use a conventional toroidal or R-type transformer transforming DC power supply.

Post time: Nov-14-2020