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Stepper motor control method
The main control methods of stepper motors include: full-step control; half-step control; micro-step control; current control; pid control; vector control, etc. If you want to know more about stepper motors, you can read the articles below this topic.
What are the control methods of stepper motors?The main control methods of stepper motors include: full step control: each pulse corresponds to a step angle, and the rotation is smooth but slow. Half-step control: Each pulse corresponds to half the step angle, and the rotation speed is fast but the accuracy is low. Micro-stepping control: subdivide the step angle to achieve higher accuracy and speed. Current control: Control current to adjust torque and speed to achieve smooth rotation and quick response. PID Control: Feedback control to improve stability and accuracy for complex and highly dynamic applications. Vector Control: Optimizes motor performance for higher torque, speed and efficiency for high performance and reliability applications.
The difference between stepper motor and servo motorThe main difference between stepper motors and servo motors is: Working principle: Stepper motors rotate through pulses, while servo motors rotate precisely through feedback control. Control mode: stepper motors rely on pulse signals, and servo motors rely on closed-loop control. Features: Servo motors have high precision, large torque, and smooth speed. Stepper motors have limited step accuracy, low torque, slow speed, and obvious vibration noise.
What is a stepper motor drive circuit?A stepper motor drive circuit is an electronic circuit that provides the signals and power required to control the movement of a stepper motor. Its main components include pulse generator, power amplifier, current controller and sequencer. By generating pulses, amplifying the pulses, controlling the winding sequence, and regulating the current, stepper motor drive circuits can precisely control the step size and speed of the motor.
What is the mastering procedure for 28BYJ-48 stepper motor?Although we have completed the program of using interrupts to control the rotation of the motor, in fact this program still has little practical value. We can't power it on and off every time we want it to rotate, right? Also, it must be able to not only rotate forward but also reverse, that is to say, it must not only be able to rotate around, but it must also be able to rotate back. Okay, let's make an example program. Combined with the key program in Chapter 8, we design a functional program like this: press the numeric keys 1 to 9 to control the motor to rotate 1 to 9 circles; use the up and down keys to change the rotation direction. , press the up key to rotate forward for 1 to 9 turns, and the down key to rotate in the reverse direction for 1 to 9 turns; the left key is fixed to rotate forward 90 degrees, and the right key is fixed to reverse 90 degrees; the Esc key terminates the transition. After this procedure, we can also further obtain
How to achieve the transfer accuracy and in-depth analysis of 28BYJ-48 stepper motorIt's turned around, but doesn't it feel a little bit wrong? too slow? Don't worry, we'll keep going. According to the principle explained at the end of this chapter, in eight-beat mode, it takes 64 rhythms for the stepper motor to rotate once. In our program, each rhythm lasts 2ms, so one revolution should be 128ms, which is 1 second. There are more than 7 turns, but why does it look like it takes more than 7 seconds to turn once? So, it’s time to understand the concept of “acceleration” in the “permanent magnet acceleration stepper motor”. Figure 9-7 is a disassembly diagram of this 28BYJ-48 stepper motor. As you can see from the picture, the white pinion in the middle is the rotor input of the stepper motor. The 64 rhythms just make this pinion It turned around, and then it drove the big light blue gear,
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