Apparatus, method, and system for controlling stepping motor

摘要

A stepping motor controller that alleviates the CPU burden of motor control tasks. An acceleration control starter initializes a pointer register with a given start angle address upon receipt of a control start signal. Duty cycles for different motor angles are previously calculated and stored in a duty cycle memory. A duty cycle selector looks up this memory to select specific duty cycles corresponding to the angle address held in the pointer register. The stepping motor is driven with pulse signals that a pulse generator produces according to the selected duty cycles. An angle address calculator adds a given address increment to the pointer register. A revolution detector detects one revolution of the stepping motor by comparing the angle address of the pointer register with an end angle address, which permits an acceleration constant calculator to change the angular increment upon detection of one revolution.