Floppy disk drive with stand-by mode

Details Floppy disk drive with stand-by mode Floppy disk drive with stand-by mode

1985-02-21

1987-01-06

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 69, 360 75, G11B 1900, G11B 2108

Patent

active

046351450

ABSTRACT:
A floppy disk drive system with a stand-by mode that shuts off power to the drive circuits that drive the head-positioning motor and the disk drive motor. The stand-by model is activated when no motor-activating signal is input within a predetermined period of time. As a result, this unique stand-by mode significantly reduces the power consumption of the floppy disk drive unit. At the same time, the stand-by mode extends the service life of several important components, such as the head-positioning pulse motor. When the stand-by mode is entered from the normal mode, the current position of the head is stored. Then when the normal mode is to be reentered from the stand-by mode, the head is first moved to a reference track and then back to the position at which the stand-by mode was entered so that the value of the two counters is equal.

REFERENCES:
patent: 3956740 (1976-05-01), Jones et al.
patent: 4519011 (1985-05-01), Bowden
IBM TDB, vol. 19, No. 4, "Head-to-Track Synchronizing Mechanism for Magnetic Disks", Porter et al., 9/76, pp. 1393-1395.

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