Data transfer apparatus with a disklike record medium and a meth

Details Data transfer apparatus with a disklike record medium and a meth Data transfer apparatus with a disklike record medium and a meth

1987-12-11

1988-11-01

Cardillo, Raymond F.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 69, 360 75, 360 97, G11B 555, G11B 1902, G11B 2102

Patent

active

047824069

ABSTRACT:
A data transfer apparatus for use with a replaceable disklike record medium such as a flexible magnetic disk having data storage tracks thereon, comprising a disk drive motor for imparting rotation to the record medium, and a head transport motor for transporting a transducer head or heads radially of the record medium so as to enable the transducer head or heads to access the individual data storage tracks on the record medium for data transfer therewith. Also included is a control and drive circuit for controllably energizing the head transport motor. When the disk drive motor is out of rotation, the control and drive circuit holds the supply voltage of the head transport motor zero, or lower than its normal operating voltage for head transportation, for saving power. Then, as the disk drive motor is set into rotation, the control and drive circuit applies the normal operating voltage to the head transport motor preparatory to the commencement of data transfer, thereby automatically recorrecting the head position on the record medium.

REFERENCES:
patent: 4005493 (1977-01-01), Morgan
patent: 4568988 (1986-02-01), McGinlay et al.
patent: 4583133 (1986-04-01), Shoji et al.
patent: 4593329 (1986-06-01), Hayakawa
patent: 4594620 (1986-06-01), Shoji et al.
Digital Circuits and Devices, Prentice-Hall, Inc. Kohonen, 1972, pp. 81-92.
Patent Abstracts of Japan vol. 8 No. 58 (p. 261) 58-205955, Nakagawa, 12/83.
Digital Design, Nov. 1977, "Floppy Drive Innovations: Challenging Hard Disks" pp. 8-10.

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