Apparatus for controlling moving speed of magnetic head

Details Apparatus for controlling moving speed of magnetic head Apparatus for controlling moving speed of magnetic head

1991-08-29

1994-02-08

Zazworsky, John

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 75, 360 7814, 360109, G11B 2108, G11B 2102, G11B 5596

Patent

active

052853306

ABSTRACT:
In a magnetic disk apparatus, the integral value of position information representing the current position of a magnetic head is obtained from address code data corresponding to a cylinder number recorded on a disk. The decimal value of the position information is computed from the level values of burst data recorded on the disk. The moving speed value of the magnetic head and a remaining distance are calculated on the basis of the position information having the obtained integral and decimal values. Two target speed values are extracted from a speed table in accordance with the remaining distance, and an intermediate value between the two target speed values is approximately computed. With this operation, a more accurate target speed value corresponding to the remaining distance is obtained.

REFERENCES:
patent: 4462053 (1984-07-01), Lum et al.
patent: 4499511 (1985-02-01), Sugaya
patent: 4524398 (1985-06-01), Fujiki
patent: 4937689 (1990-06-01), Seaver et al.
patent: 4937803 (1990-06-01), Nakane
patent: 5021898 (1991-06-01), Sakai et al.
patent: 5051851 (1991-09-01), Sakurai
patent: 5126897 (1992-06-01), Ogawa et al.
patent: 5168398 (1992-12-01), Kanda et al.

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