SHUTTLE CONTROL SYSTEM FOR PRINTER

摘要

PROBLEM TO BE SOLVED: To reduce drive current while sustaining stabilized operation of a stepping motor for driving a shuttle mechanism section in a printer having a shuttle mechanism being driven by the stepping motor for performing constant current control of drive current. SOLUTION: The purpose can be achieved by feedback controlling the drive current of the stepping motor depending on the difference of phase angle between the stator and rotor of the stepping motor.