Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1996-05-21
2000-09-26
Loomis, Paul
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360 7804, G11B 5596
Patent
active
061250007
ABSTRACT:
The present invention relates to a disk drive seek control system which is capable of rapidly moving a transducer from an initial position to a target position above a data storage medium. The system applies control to an actuator motor means based on projected transducer velocity at a future servo sample time rather than velocity at a previous servo sample time. This allows the system to significantly reduce transducer velocity errors relative to a desired velocity profile. In addition, the system utilizes dynamically adapted feed forward deceleration current during a deceleration portion of the seek cycle to further reduce velocity errors during this period. By reducing velocity error during the seek cycle, the system significantly reduces the length of time required for settling the transducer on the target track of the disk after the seek cycle has ended.
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Birtzer Mark
Carlson Lance R.
Hutsell Larry
Loomis Paul
Maxtor Corporation
Wong K.
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