Method and apparatus for performing a seek

Details Method and apparatus for performing a seek Method and apparatus for performing a seek

1990-06-15

1992-06-02

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7804, 360 7809, 318561, 318632, G11B 555

Patent

active

051192500

ABSTRACT:
Disclosed is a method for performing a seek operation in a disk drive using current in the saturation mode to accelerate and decelerate the actuator arm. In a first embodiment, several measurements are made during the acceleration portion of the seek to estimate the deceleration available in saturation mode. In a second embodiment, the point at which the current is switched from acceleration current to deceleration current is adjusted based upon the position where the actuator arm comes within a desired amount of the velocity of a velocity profile assuming worst case conditions.

REFERENCES:
patent: 4030132 (1977-06-01), Iftikar et al.
patent: 4544968 (1985-10-01), Anderson et al.
patent: 4899234 (1990-02-01), Genheimer
patent: 4982298 (1991-01-01), Volz et al.
Commander et al., Disk File Track Access Control, IBM Technical Disclosure Bulletin, vol. 16, No. 12, May 1974, pp. 4064-4065.

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