System and method for positioning a magnetic head transducer on

Details System and method for positioning a magnetic head transducer on System and method for positioning a magnetic head transducer on

1979-06-04

1981-06-09

Eddleman, Alfred H.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 99, 360133, G11B 2110, G11B 555, G11B 2302

Patent

active

042727936

ABSTRACT:
A system and method reduces the access time for a magnetic head transducer to be positioned on a selected recording track of an information storage media. A digital processor, responsive to a signal indicative of the selected track location determines the number of tracks separating the present location of the head from the selected track location and generates a series of alternate acceleration and deceleration control signals in accordance with a permanently stored instruction set. If the head is to be moved fewer than a predetermined number of tracks, the digital processor controls the head positioning servo system to move the head to the desired track location in single track increments. On the other hand, if the head is to be moved a distance equal to or greater than the predetermined number of tracks, the digital processor controls the servo system to move the head in one or more multi-track increments, each increment being comprised of a preselected number of tracks, followed by a series of single track increments.

REFERENCES:
patent: 3838457 (1974-09-01), Palmer
patent: 4096534 (1978-06-01), Brownback et al.
patent: 4103314 (1978-07-01), Case
patent: 4106058 (1978-08-01), Romeas et al.
patent: 4125882 (1978-11-01), Erickson, Sr. et al.
patent: 4135217 (1979-01-01), Jacques et al.
patent: 4175274 (1979-11-01), Mann

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