System for controlling displacement of a head in a disc storage

Details System for controlling displacement of a head in a disc storage System for controlling displacement of a head in a disc storage

1989-04-11

1991-10-22

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7804, 369 32, 369 33, 318696, G11B 2108, G11B 555

Patent

active

050600931

ABSTRACT:
A system for controlling the displacement of a head to reduce access time in a disc storage unit having a multiphase stepping motor. While the disc storage unit receives a series of pulses designating the desired displacement of the head, a counter counts the number of pulses received. When the count exceeds a predetermined value at the end of a predetermined time as indicated by a timer, a driving unit selectively drives the stepping motor to displace the head. Displacement of the head towards a desired position may begin before reception of the series of pulses designating the desired position is completed, thereby reducing access time.

REFERENCES:
patent: 3458786 (1969-07-01), Thompson
patent: 4564796 (1986-01-01), Yoshino et al.
patent: 4724369 (1988-02-01), Hashimoto

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