Single stage track seek method

Details Single stage track seek method Single stage track seek method

1988-10-03

1990-12-25

Richardson, Robert L.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

360 7806, 360 7807, 360 7808, G11B 7085

Patent

active

049808761

ABSTRACT:
A seek method for disk drive is described. In the seek method of the present invention, the tracking servo loop remains in a track positioning mode throughout the entire seek process. By effectively varying the reference position of the head with respect to track center under a predetermined profile, the track positioning mode is utilized to produce a pseudo-continous movement across the disk surface. In essence, the servo track following loop attempts to mainta position relative to a local track center as dictated by profile information supplied by a microprocessor. The system of the present invention is an open loop in the sense that no attempt is made to loop information about deviation from the predefined profile back to the microprocessor. Local positioning, however, remains closed loop at all times so that the system is always within the predicted track and arrives directly on target.

REFERENCES:
patent: 4532562 (1985-07-01), Powell
patent: 4697127 (1987-09-01), Stich et al.

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