Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1990-02-28
1992-11-24
Psitos, Aristotelis
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360 7804, G11B 5596, G11B 558
Patent
active
051668424
ABSTRACT:
A method for effecting a transition from data track following by one data head adjacent one disk of a rotating disk data storage device to data track following by a second data head adjacent a second disk wherein the data tracks are part of a cylinder of tracks including a servo track followed by a servo head with an offset appropriate to each data track. A servo control circuit between the servo head and the coil of an actuator on which the heads are mounted receives a position error signal from the servo head and an offset signal from a microcomputer during following of each track and the transition is effected by adjusting the offset signal in a succession of discrete steps from the offset appropriate for one data head to the offset appropriate to the other data. Steps of the succession can have magnitudes equal to successively selected proportions of the offset signal difference for the two data heads or can vary alternatively between the offset signal difference for the two heads and a zero magnitude.
REFERENCES:
patent: 4268785 (1981-05-01), Svendsen
patent: 4371960 (1983-02-01), Kroiss
patent: 4381526 (1983-04-01), McLaughlin et al.
patent: 4937689 (1990-06-01), Seaver
A. Paton, Correction of Data Track Mistregistration in Servo Controlled Disk Files, Nov. 1974, IBM Technical Disclosures Bulletin, vol. 17, No. 6.
Albert Glenn D.
Filter Jonathan S.
Heller III Edward P.
McCarthy Bill D.
Psitos Aristotelis
Robertson David L.
Seagate Technology Inc.
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