1. How to choose stepper and servo motors?
Mainly depends on the specific use situation, briefly speaking, it is necessary to determine: the nature of the load (such as horizontal or straight load, etc.), torque, inertia, speed, accuracy, acceleration and deceleration and other requirements, upper control requirements (such as port interface and communication requirements), the main control method is position, torque or speed method. The power supply is DC or AC power, or battery power, voltage range. This is used to determine the type of motor and the type of drive or manipulator to be used.
2. Is it still a servo motor system?
In fact, what kind of motor to choose should be based on the specific use situation, each with its own characteristics.
3. How to use stepper motor driver?
Depending on the current of the motor, a driver greater than or equal to this current is used. If low oscillation or high accuracy is required, a segmented drive can be used. For high-torque motors, high-voltage drives are used as much as possible to achieve outstanding high-speed performance.
4. What is the difference between 2-phase and 5-phase stepper motors, and how to choose?
The cost of the 2-phase motor is low, but the vibration is greater at low speed, and the torque decreases quickly at high speed. The 5-phase motor has less oscillation and good high-speed performance, which is 30-50% faster than the 2-phase motor, and can replace the servo motor in some occasions.
5. When to choose DC servo system, and what is the difference between it and communication servo?
DC servo motors are divided into brushed and brushless motors. The brush motor has low cost, simple structure, large starting torque, wide speed regulation range, simple operation, and needs 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 ordinary 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 rolling and stable in torque. The control is messy, simple to achieve 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.
Communication servo motor is also a brushless motor, divided into synchronous and asynchronous motors, at present, synchronous motors are generally used in motion control, its power range is large, can do a lot of power. The high inertia has a low rolling speed and decreases rapidly as the power increases. Therefore, it is suitable for low-speed and stable operation.
6. What should I pay attention to when using the motor?
Before powering on, the following checks should be made:
(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 misconnected, whether the motor type or current setpoint on the drive controller is appropriate (not too large at the beginning)
(2) The control signal cable is reliable, and the shielding problem should be considered in the industrial site (such as the use of twisted pair)
(3) Don't connect all the wires that are required at the beginning, only connect them to the fundamental system, and then gradually connect them after they are in excellent operation
(4) It is necessary to figure out the grounding method, or choose to float without connection
(5) Within half an hour of starting operation, you should closely investigate the status of the motor, such as whether the movement is normal, the sound and the temperature rise, and stop the machine immediately for adjustment if the problem is found.
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