Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1988-02-09
1989-10-17
Faber, Alan
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360 7703, G11B 5596
Patent
active
048751162
ABSTRACT:
In a data storage and retrieval system employing a magnetic disk as the storage medium, a monophase encoder is coupled, typically, to an electric seek motor for optoelectronically producing an output representative of the position of a data transducer with respect to a multiplicity of concentric data tracks on the disk. Electrically connected to the monophase encoder is a triple detector circuit for deriving from the encoder output a transducer position signal representative of the transducer position on the disk, an actual transducer speed signal representative of the transducer speed relative to the disk, and a track boundary signal representative of boundaries between the data tracks on the disk. The transducer position signal and actual transducer speed signal are both fed to a seek motor control circuit, whereas the track boundary signal is fed to a controller microprocessor, which then delivers to the seek motor control circuit a requested transducer speed signal at which the transducer is to be moved across the data tracks during operation in a seek mode. In response to the incoming signals the control circuit controls the seek motor for transporting the transducer to a desired track at a desired speed and for positioning the transducer in centerline alignment with the track.
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Wada Sumio
Yasuda Kazuhiko
Faber Alan
Robertson David L.
Teac Corporation
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