Method for high speed positional control of a transducer for rot

Details Method for high speed positional control of a transducer for rot Method for high speed positional control of a transducer for rot

1990-05-24

1993-05-04

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7804, G11B 555, G11B 5596

Patent

active

052087107

ABSTRACT:
A transducer position control method suitable for practice with a magnetic disk of the kind wherein the data tracks are divided into a plurality of groups, each group of tracks being individually identified by the same set of address code characters prerecorded thereon for the simplicity of the address code. As the transducer travels at controlled speed from a departure track to a destination track, reading the address code characters on the successive tracks being traversed, the address code characters are sampled at regular intervals. The transducer may skip over one complete track group during each sampling interval as the seek speed is made higher than heretofore. Therefore, each time an address code sample is obtained, the actual rate of transducer moving during the previous sampling interval is compared with an expected rate of transducer movement for the same sampling interval in order to determine the current transducer position and the remaining number of tracks to the destination track.

REFERENCES:
patent: 4072990 (1978-02-01), Case et al.
patent: 4419701 (1983-12-01), Harrison et al.
patent: 4488189 (1984-12-01), Axmear et al.
patent: 4524398 (1985-06-01), Fujiki
patent: 4691152 (1987-09-01), Ell et al.
patent: 4816942 (1989-03-01), Tanishima et al.
patent: 5079654 (1992-01-01), Uno et al.

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