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Stepper motor driver is an actuator which can convert the electrical pulse signal to angular displacement. When the stepper motor driver receives an electric pulse signal, it will drive the stepper motor to rotate a fixed angle displacement (we call it "step angle") according to the direction set previously. Its rotation is operated step by step according to a fixed angle. We can control the angular displacement by controlling the number of pulses sent, so as to achieve the purpose of accurate positioning; at the same time, we can also control the speed and acceleration of the stepper motor rotation by controlling the frequency of the pulse signal, so as to achieve the purpose of speed regulation and positioning.
Stepping motor driver subdivision will produce a qualitative leap in motor performance, but all these are generated by the driver itself, and has nothing to do with the motor and control system. In application, the only thing users need to pay attention to is the change of step angle of stepping motor, which will affect the frequency of step signal sent by control system. Since the step angle of stepping motor will be smaller after subdivision, the frequency of stepping signal should be improved accordingly. Take the 1.8 degree stepping motor as an example: the step angle of the driver is 0.9 degrees in the half step state, and 0.18 degrees in the ten subdivision state. In this way, under the condition that the motor speed is the same, the frequency of the step signal sent by the control system is 5 times of that in the half step operation.