Carriage controlling apparatus for floppy disk apparatus

Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head

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Details

360 7702, 360 7804, G11B 556

Patent

active

050738321

ABSTRACT:
In a discrimination mode for discriminating a track density mode of an FDD using a carriage mechanism of the lead screw type, on the basis of a reciprocal seek operation of a magnetic head, when a carriage is moved a seek distance dependent on a track density in a forward seek mode, the drive of the carriage mechanism can reliably be stopped. This realizes a reciprocal seek operation of the head that depends on a track density mode of the FDD. Accordingly, a host computer compares the number of pulses contained in a STEP signal in a forward seek stroke with that in a reverse seek stroke, and reliably discriminate a track density mode of the FDD on the basis of the comparison result.

REFERENCES:
patent: 4428012 (1984-01-01), Applequist et al.
patent: 4644418 (1987-02-01), Banno et al.
patent: 4771346 (1988-09-01), Shoji et al.
patent: 4924333 (1990-05-01), Hamaoka

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