As operation of the stepping motor is controlled on the basis of the stepping motor control unit,

摘要

PROBLEM TO BE SOLVED: To provide a stepping motor controller which smooths motor work.;SOLUTION: When a motor working time T1 set for each control period of ECU becomes shorter than the control period, a working pulse for the motor work is divided into two, a command pulse signal inserting a hold excitation pulse for hold excitation between sets of the working pulse divided into two is constituted, and a stepping motor is controlled on the basis of the command pulse signal. In such a case, when the number of working steps is small, a non-excitation state (T3) causing the motor stopping time Ts to be much longer may arise, but a chance is reduced that puts the motor into non-excitation by dividing the motor work by the working pulse divided into two and by performing a hold excitation operation every its work.;COPYRIGHT: (C)2009,JPO&INPIT