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    How to Select a Contactor?

    As equipment to disconnect load power, selection of contactor should meet requirements of controlled equipment. Except that the rated operational voltage is the same with the rated operational voltage of controlled equipment, load power, usage category, control mode, operation frequency, working life, installation method, installation dimension and economy of controlled equipment are the basis of selection. How to choose a right contactor? The principles are as follows:

    How to Reduce Switching Power Supply Noise?

    Switching power supply (SMPS) is widely used due to its compact size, light weight and high efficiency. But it has its own disadvantage of producing noises, which not only affect the normal operation of the circuit, but also interfere with the neighboring electronic equipment. So how to reduce the noise of SMPS? First of all, we need know where the noise comes from, and then we can eliminate it accordingly.
    The noise of switching power supply can be divided into two major categories: one is the interference formed by the internal components of SMPS, and the other is the interference caused by the external factors. There are many sources of noise, such as external interference like lightning, mechanical vibration, poor contact and so on. Besides, improper design of circuit, improper parameter selection of components, unreasonable layout and wiring will also increase the power supply noise.

    How to choose and use a switching power supply?

    How to choose a right switching power supply? Six tips will give you a guide of selecting a right SMPS power supply: voltage, power, load characteristics...
    How to use a switching power supply properly? To use a SMPS power supply properly and in long service life, some suggestions are made for your reference.

    How to Select an EMI Power Line Filter?

    Power line filter is electrical equipment which effectively filters particular frequency point in the power line or the frequency out of the particular frequency point. It is a passive bi-directional network, that is, one end is power supply, and the other end is load. When selecting an EMI power line filter, what should be taken into considerations? Rated voltage, rated current, insertion loss...

    How to Select a Right Solid State Relay?

    How to select a right solid state relay? When selecting solid state relay(SSR), it should be based on the actual application conditions and SSR performance parameters, and especially take into consideration the overcurrent and overvoltage conditions in the use and the load capacity of SSR, which is helpful to achieve the long life time and high reliability of solid state relays. Then, follow the questions and find the detailed answers to choosing a right  SSR.

    Stepper Motor Troubleshooting

    Stepper motors are now widely used in the industrial areas, but from time to time some problems with stepper motors occurs as follows. Aimed to these problems, there are some troubleshooting for your reference.

    1. How to control the direction of stepper motor?
    2. When stepper motor generates vibration and noise, how to do it?
    3. Why the stepper motor doesn’t rotate or move back and forth after it is powered?
    4. Why the torque of stepper motor is decreasing with the rise in rotational velocity?
    5. Why stepper motor can run normally at low velocity, but can’t start at certain higher velocity with some noise of whistler?
    6. How to prevent the power interference of stepper motor?
    How to prevent stepper motor losing step?

    Stepper motor is an open-loop control motor which transforms electric pulse signal into angular displacement or linear displacement.  However, there are some errors occuring between the actual angle stepper motor rotates and the theoretical step distance. There are some certain errors from one step to any other step, but the step number of each cycle of the stepper motor is the same. In the case of no step loss, the step error is not accumulated for a long time.
    How to prevent step loss with stepper motor as the above mentioned? First of all, we need to know why stepper motor losses step?

    1. The rotor acceleration is slower than the rotating magnetic field of the stepper motor.
    2. The average speed of the rotor is higher than the average rotating speed of the stator magnetic field.
    3. The load inertia of stepper motor is large.
    4. The stepper motor produces the resonance.
    How to select stepper motor and servo motor?

    It depends on specific application situation, and to put it in a simple way: Nature of load (for example, vertical load or horizontal load), requirements of torque, inertia, speed, accuracy and acceleration and deceleration, requirements of upper control (such as requirements of port interface and communication), whether major controlling mode is position, torque or speed mode, whether power supply is direct or alternating current power supply, or battery powered, and voltage scope. Based on this, we can determine models of motor and supporting drives or controllers.

    How to deal with the problem of servo motor overheating?

    As the executive element of mechanical equipment, servo motor is used widely in servo system. When using servo motor, there is a phonomena of overheating when working. As you are not familiar with the principle and structure of servo motor, how to judge whether the heating value is normal or not? And how to reduce the heating value of servo motor?

    How to solve the problem of stepper motor overheating

    One of the most significant advantages of stepper motor is that it can be controlled accurately in open loop system because the rotor position can be determined only by tracking the input step pulse, but overheating problem occurs easily in stepper motor, so how to solve this problem if such condition occurs?

    Tips for Replacing Stepper Motor with Servo Motor

    In the specific occasion, when the terminal load is stable, the action is simple and the motor basically runs at low speed, it is appropriate to choose the stepper motor with low cost and easily controlling. However, when terminal load fluctuation range is large, action is simple and the motor basically runs at low speed, if still choosing the stepper motor, a series of troubles are coming. In fact, in such situation, servo motor should be chosen, as the comprehensive cost will decline considering many factors.

    How to use VFD for single phase motor?

    Using VFD for speed regulating has many advantages. Many small power motors adopt single phase power supply. How to use VFD to regulate speed for single phase motors? ATO will provide the following methods.

    How to choose a laser marking machine?

    There are five matters need attention in choosing a laser marking machine.
    I. The selection of the breadth size
    II. Spindle motor of the laser marking machine
    III. The selection of controlling means and speed
    IV. Guide rail
    V. Precision