Patent ID: 6654321
Filing Date: 2003-11-25
Classification: G11B

Abstract:
A stepping motor control apparatus comprising:a first driving signal generating means for generating a first driving signal for slowly rotating said stepping motor; second driving signal generating means for generating second driving signal for rapidly rotating said stepping motor; and control means for switching signal generating means between said first driving signal generating means and said second signal generating means, wherein said controlling means, when switching the rotation of said stepping motor from slow to rapid, decides whether or not a rotator of said stepping motor exists near a mechanical stability point of said stepping motor according to a voltage value of a driving signal output from said first driving signal generating means, wherein when the rotator of said stepping motor exists near a mechanical stability position, said controlling means outputs a command to said second driving signal generating means, and when said second driving signal generating means receives said command, said second driving signal generating means outputs a driving signal for rotating said stepping motor to the next mechanical stability position of said above mechanical stability position, in a rotating direction of said stepping motor.