Stepper motor speed control is generally to change the input pulse frequency of the stepper motor speed to achieve, because the stepper motor to a pulse on each rotation a fixed angle, so that you can control the stepper motor by a pulse to the next pulse interval to change the pulse frequency, the length of delay to the specific control step angle to change the motor speed in order to achieve the stepper motor speed. Design used in this type of microcontroller AT89C51 CP internal timer to change the frequency of the pulse in order to achieve the speed of the stepper motor to control the motor speed control and reversing function.

89C51 speed\基于89C51单片机的步进电动机调速系统设计.doc
89C51 speed

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