PM Stepper motor
Correct choice of servo motor and stepper motor
It mainly depends on the specific application. Simply put, it is necessary to determine: the nature of the load (such as horizontal or vertical load, etc.), torque, inertia, speed, accuracy, acceleration and deceleration requirements, and upper control requirements (such as port interface and communication Aspect requirements), the main control method is position, torque or speed. The power supply is DC or AC power, or battery power, and the voltage range. Based on this, determine the model of the motor and the matched drive or controller.1
When to choose a DC servo system and what is the difference between it and AC servo
The brush motor has low cost, simple structure, large starting torque, wide speed range, easy control, and maintenance is required, but it is easy to maintain (change carbon brushes), generate electromagnetic interference, and have requirements for the environment. 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 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
Can I directly control the servo motor through communication
Yes, it is more convenient. It is only a speed issue. It is used for applications that do not require too much response speed. If fast response to control parameters is required, it is best to use a servo motion control card. Generally, there are 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.3
Can stepping and servo motors be disassembled for maintenance or modification?
No, it is best to let the manufacturer do it. After disassembly, it is difficult to install it back without professional equipment. The gap between the rotor and the stator of the motor cannot be guaranteed. The performance of the magnetic steel material is destroyed, and even loss of magnetism is caused, and the motor torque is greatly reduced.4
Can the servo controller sense changes in external load?
If you encounter a set resistance, stop, return or maintain a certain thrust to follow up.5