ABSTRACT
Stepper motor has been developing rapidly since it’s birth, it
is widely used in medical equipment, testing instruments, digital
products and other various aspects of human society. Stepper motor of
this design is based on single chip microcomputer AT89C52, and it is
running by four phase four. It send pulses with the method of
software, the message will be sended to stepper motor through the
amplification by 74 ls245. We Use two muttons controing the motor
forwarding and reversing, two buttons controlling the motor
accelerating and decelerating,two digital tube display ing the
direction and the gears of speed of the motor. By changing the
interval between the pulses of two phase of neighbouring, namely, by
adjusting the width of pulse, we change the speed of the motor.
We control the two buttons of forwarding and reversing by the way
of querying. We use the way of Interrupt service controlling the
buttons of accelerating and decelerating. once the acceleration or
deceleration keys has been pressed the single chip microcomputer will
generate interrupts, and it will enter the interrupting program
immediately, and do the corresponding operation.In this way,we will
control the motor accelerating and decelerating
conveniently.besides,digital tube can display the speed and direction
of the motor immediately,which woud make the user intuitive and
safer.The stepper moror which based on the controlling of pulse are
more steady and correct compared with others.I belive that the
diveloping of stepper motor will be faster,and the technology will be
moer mature.In a word,the stepper motor will service people better in
the future.
Keywords: Stepper motor,single chip microcomputer,interrupting
service,pulse
