Many engineers often encounter this problem when debugging stepper motors: Why does my stepper motor rotate so slowly? How can I increase the speed, and what is the maximum speed it can reach? Let's discuss this issue together.
The basis for determining the method to increase the stepper motor speed: stepper motor speed.
V(r/s) is the actual speed of the stepper motor, and the unit is revolutions per minute;
P is the frequency of the pulses sent by the host computer, and θ is the inherent angle of the stepper motor, such as 0.9° or 1.8°.
m is the subdivision coefficient.
For example, there is a stepper motor with θ = 1.8°, microstepping m = 10, and the host computer sends pulses at a frequency of 10kHz.
The stepper motor's rotational speed is:
V = 10,000 * 1.8 / 360 / 10 = 5 rpm, which means the stepper motor rotates 5 times per minute. In this case, the stepper motor rotates very slowly, like a snail.
If you want to increase the engine speed, there are two methods:
1. Increase the pulse frequency. For example, if the pulse frequency is increased to 100KHz, the speed will be equal to 50rpm, which is a tenfold increase in speed. If you are using a PLC pulse output to control the stepper motor, you need to check the maximum value of the PLC pulse output frequency. For example, Yiwei PLC can support high-speed pulse output of 20KHz, 200KHz and 500KHz, which can provide higher speeds.
2. Reduce the subdivision factor m, for example, reduce m to 5, then the speed is equal to 10 rpm.
Notice:
1. When the pulse frequency can be increased, try not to decrease the value of m.
2. The speed of the stepper motor should preferably not exceed 600 rpm.
