Disc drive apparatus with servo tracks offset from data tracks

Details Disc drive apparatus with servo tracks offset from data tracks Disc drive apparatus with servo tracks offset from data tracks

1990-12-11

1993-08-10

Dixon, Joseph L.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360135, G11B 582

Patent

active

052354784

ABSTRACT:
A disc drive apparatus with a tracking servomechanism, comprising at least one disc medium having data surfaces where servo signal and data signal are recorded; transducer means having a first head for reproducing the data signal from the data tracks in a playback mode, and a second head for recording the data signal on the data tracks in a recording mode; a rotary arm for supporting the transducer means at one end thereof; actuator motor means for driving the rotary arm in a manner to move the transducer means over the data tracks; servo signal processing means for receiving and processing the servo signal reproduced by the transducer means and outputting first and second servo control signals; and positioning control means for controlling the actuator motor means in the playback and recording modes respectively in accordance with the first and second servo control signals so that the first head of the transudcer means is positioned precisely on any selected one of the data tracks in the playback mode and also that the second head is positioned precisely on any selected one of the data tracks in the recording mode.

REFERENCES:
patent: 4594622 (1986-06-01), Wallis
patent: 4802033 (1989-01-01), Chi
patent: 4912585 (1990-03-01), Belser et al.

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