What is the subdivision of a stepper motor? What is a subdivision? Is the subdivision the higher the accuracy the more?

Many users mistakenly think that the higher the stepper motor driver subdivision, stepper motor precision is higher, in fact, this is a wrong idea, such as stepper motor driver subdivision can reach 60,000 pulses a turn, and stepper motor is not really able to distinguish this accuracy, when the drive set to 60,000 pulses/rpm , the stepper motor driver accepts several pulses and the stepper motor takes one step, which does not improve the precision of the stepper motor.

The subdivision technology of stepping motor is essentially an electronic damping technology, whose main purpose is to weaken or eliminate the low frequency vibration of stepping motor, and to improve the running precision of the motor is only a incidental function of subdivision technology. The actual step angle of the breakdown after the electric running is one of the basic step angle. (Two-phase stepper motor Basic Step angle is 1.8°, that is, a pulse to go 1.8°, if there is no subdivision, it is 200 pulses to walk a circle of 360°, subdivision is through the driver by the precise control of the motor phase currents produced, independent of the motor, if it is 10 subdivision, then send a pulse motor to go 0.18°, That is, 2000 pulses to walk 360°, the accuracy of the motor can reach or close to 0.18 °, but also depends on subdivision of the driver subdivision of the current control accuracy and other factors. The precision of the subdivision drives of different manufacturers may vary greatly; the greater the precision the finer the more difficult the control. By the second analogy. The basic step angle of the three-phase stepper motor is 1.2°, that is, a pulse to go 1.2°, if there is no subdivision, it is 300 pulses walk a circle of 360°, if it is 10 subdivision, then a pulse, the motor goes 0.12°, that is, 3,000 pulses to walk a circle of 360°, to the second analogy. In the actual use of the motor, if the speed requirements are high, and the accuracy and smoothness of the requirements are not high, do not choose High Subdivision. In practical use, if the speed is very low, you should select a large subdivision to ensure smooth, reduce vibration and noise. ）

Reproduced in http://blog.csdn.net/liucheng_34/article/details/48048275