Magnetic disk drive with compensation against disturbance

Details Magnetic disk drive with compensation against disturbance Magnetic disk drive with compensation against disturbance

2005-04-13

2009-08-25

Davis, David D (Department: 2627)

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

Reexamination Certificate

active

07580221

ABSTRACT:
A magnetic disk drive is to be provided wherein oscillations in thrust, conical and translational modes of a spindle caused by disturbance are to be damped to diminish a positioning error and thereby attain a high recording density and improved accessing performance. In one embodiment, there is provided a compensation circuit using acceleration or angular acceleration sensors, the sensors being disposed on a base, a cover or a PCB (printed circuit board) of a magnetic disk drive so that they can detect disturbance effectively, and wherein a mechanical system transfer characteristic of and other parameters in thrust, conical, or translational mode of a spindle are acquired or calculated by a processor and unnecessary oscillation in each mode is compensated. In another embodiment, to measure a transfer characteristic of the spindle in thrust mode and other parameters after installation of the magnetic disk drive in a case, piezoelectric elements are provided as one of oscillating means. The measurement may be made repeatedly at predetermined intervals.

REFERENCES:
patent: 5426545 (1995-06-01), Sidman et al.
patent: 5757580 (1998-05-01), Andress et al.
patent: 5923487 (1999-07-01), Carlson et al.
patent: 6593855 (2003-07-01), Fujino et al.
patent: 6597532 (2003-07-01), Usui et al.
patent: 02179479 (1990-07-01), None
patent: 2000097730 (2000-04-01), None
patent: 2001-291348 (2001-10-01), None

Affiliated with

Also associated with

Rating

Magnetic disk drive with compensation against disturbance does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Magnetic disk drive with compensation against disturbance, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic disk drive with compensation against disturbance will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4079884