Disk drive apparatus and seek method

Details Disk drive apparatus and seek method Disk drive apparatus and seek method

2005-09-08

2009-10-06

Young, Wayne R (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S053290, C369S053390

Reexamination Certificate

active

07599257

ABSTRACT:
The determination on the reach to a BCA by using a pull-in signal in a seek for the BCA may eliminate the necessity of a position sensor for determination of the reach to a BCA, for example, which can realize a seek independent of a count of the number of steps by a stepping motor, for example. Thus, the construction can be simplified, and the costs can be reduced. Furthermore, the required accuracy of disk chucking and mechanical accuracy of the mechanisms may be alleviated, which can provide simplicity in design and manufacture. The pickup unit can be allowed to perform the secure reading of information in a BCA by, after the transporting unit is stopped based on the determination on the reach to the BCA, monitoring the determination results (determination signals) based on a pull-in signal, for example, with the objective lens at different positions and controlling the position of the objective lens to an optimum position.

REFERENCES:
patent: 6519213 (2003-02-01), Song et al.
patent: 64-67776 (1989-03-01), None
patent: 2002-279624 (2002-09-01), None
patent: 2003-67937 (2003-03-01), None

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