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US 2003/0117742 A1Published application
Head positioner and disk drive using the same
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsHiroshi Koso, Hideki Kuwajima
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AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsHiroshi Koso, Hideki Kuwajima
Estimating the term…
A head positioner comprises a degradation detecting unit for detecting degradation of a fine motion actuator based on current flowing through a piezo element constituting the fine motion actuator and a performance recovering unit for repairing the degradation when the degradation is detected. A fine motion driver has a function of generating a fine motion driving signal, a function of generating a predetermined voltage used for detecting the degradation, and a function of outputting a high voltage signal used for repairing the degradation. Therefore, the present invention can provide a head positioner for realizing stable positioning control for a long time even when degradation of the positioning performance is generated by an electric short circuit or the like, and provide a disk drive.
A head positioner having, as a head positioning means, an actuator including a fine motion actuator unit for fine positioning with a piezo element and a coarse motion actuator unit for coarse positioning, said head positioner comprising:
A disk drive having a head positioner having, as a head positioning means, an actuator including a fine motion actuator unit for fine positioning with a piezo element and a coarse motion actuator unit for coarse positioning, said head positioner comprising:
Dependencies are inferred from the claim text.