Head position controller

Abstract

Abstract PURPOSE:To shorten the seek operation time and the settling time, and to stabilize the follow-up control by executing the follow-up control after having decreased suddenly a head moving speed. CONSTITUTION:A head moving speed is controlled by obtaining a head position signal by a head position detecting sensor 6, obtaining a head moving speed signal from the head position signal, comparing a speed profile signal having at least a positive speed and the speed signal in a target track obtained in accordance with a difference of the present track position and the target track position and controlling a head driving motor 5. Also, when it is detected that a head passes through the target track by a head position signal, a brake current corresponding to a moving speed of the head is supplied to the head driving motor 5, and after decelerating enough the moving speed of the head, the head is positioned exactly to the target track by the head position signal. In such a way, the seek operation time and the settling time are shortened, and the follow-up control can be stably executed.

Inventors

• 👤 Hiroaki Yada
• 👤 Yasuaki Suzuki

Bibliographic Details