Head feed control apparatus

Details Head feed control apparatus Head feed control apparatus

1986-03-10

1987-11-10

Stephan, Steven L.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369215, 369244, G11B 1706

Patent

active

047062347

ABSTRACT:
A head feed control apparatus for a recording/reproducing system using a disk-like data recording medium with a plurality of concentric tracks thereon includes a linear scale mounted on a head and provided with graduations at predetermined intervals, and a scale detector for reading the graduations of the linear scale. This apparatus performs sampling and access operations. In sampling, the head is moved by a predetermined number of graduations of the scale, and a corresponding address is read to detect the number of tracks of each recording medium zone which corresponds to the predetermined number of graduations and to store (the predetermined number of graduations).div.(the number of tracks) as a zone parameter. In access operation, the head is moved by the number of scale graduations corresponding to (an average value of parameters between a zone where the head is currently located and a zone where a target track is located).times.(the number of tracks between the current and target tracks), and thereafter fine adjustment of the head position is performed.

REFERENCES:
patent: 4445583 (1984-06-01), Schultz
patent: 4509154 (1985-04-01), Kimoto

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