公开(公告)号：DE3881314D1

公开(公告)日：1993-07-01

申请号：DE3881314

申请日：1988-08-16

Applicant: IBM

Inventor： SHIH SHIH-MING ,  SPANEL RICHARD JAMES ,  YAMAMOTO KENNETH GREGORY ,  YU MAN-HON MANTLE

IPC: G11B21/08 ,  G11B21/10

Abstract: A single processor in a disk file digital servo control system generates a head actuator control signal at two different rates, depending on whether the read/write head is being moved between data tracks or is following a specific track. A sampling clock generator (65) receives servo timing information from a recorded servo disk surface (22) and generates interrupt signals to the processor at predetermined frequencies selected by the time required for the processor to run the algorithm which generates the control signals. Upon receipt of a seek command to move the head to a target track, or a predetermined head position error signal indicative of arrival of the head to the target track, the microprocessor enables or disables appropriate interrupts so as to select one of the appropriate rates for generating the control signals. The digital servo control system thus allows servo position information to be sampled at a higher frequency during track following.

公开(公告)号：DE3881314T2

公开(公告)日：1993-12-02

申请号：DE3881314

申请日：1988-08-16

Applicant: IBM

Inventor： SHIH SHIH-MING ,  SPANEL RICHARD JAMES ,  YAMAMOTO KENNETH GREGORY ,  YU MAN-HON MANTLE

IPC: G11B21/08 ,  G11B21/10

Abstract: A single processor in a disk file digital servo control system generates a head actuator control signal at two different rates, depending on whether the read/write head is being moved between data tracks or is following a specific track. A sampling clock generator (65) receives servo timing information from a recorded servo disk surface (22) and generates interrupt signals to the processor at predetermined frequencies selected by the time required for the processor to run the algorithm which generates the control signals. Upon receipt of a seek command to move the head to a target track, or a predetermined head position error signal indicative of arrival of the head to the target track, the microprocessor enables or disables appropriate interrupts so as to select one of the appropriate rates for generating the control signals. The digital servo control system thus allows servo position information to be sampled at a higher frequency during track following.