| 摘要 |
PURPOSE:To perform a control for rotating a motor smoothly in a facsimile equipment, by which the freedoms in the controls when accelerating, decelerating and rotating at a constant speed the motor for carrying sheets are made large, and by which the accuracy in the time interval of pulses for changing over excitation phases is made good. CONSTITUTION:A plurality of pulse interval data T1-T4 for changing over excitation phases to each other are stored in a section 3 for storing the pulse interval data. Then, they are taken out in order by a multiplexor 14, and are inputted to a comparator 17. The comparator 17 compares the pulse interval data with a value obtained by making a counter 16 count the signal of the predetermined frequency, which is converted from a reference clock by a clock frequency converting section 15. When both coinciding with each other, the pulses for changing over excitation phases to each other are generated from a section 18 for generating the pulses for changing over excitation phases to each other. Thereby, stepping motors 3, 5 are rotated with desired control patterns. |
