Floppy disk driver

Details Floppy disk driver Floppy disk driver

1985-03-01

1986-08-05

Stellar, George G.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

G11B 1926

Patent

active

046046631

ABSTRACT:
A floppy disk driver intended to protect the disk center hole from damage when the disk is mounted. The arrangement includes a speed detection circuit for detecting a relatively low rotational speed of the disk and a control circuit for speeding up the disk to a higher rotational speed for the read/write operation in response to the detection of the lower disk speed, whereby the disk is protected from damage by being rotated at the lower speed when its center hole is held between the collet and spindle.

REFERENCES:
patent: 4376293 (1983-03-01), Teramura
patent: 4547820 (1985-10-01), Saito
Research Disclosure, Nov. 1984, No. 247, #24736, Disk File Soft Starting, (Controlled Initial Acceleration), anonymous, Kenneth Mason Publications Ltd., England.

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