Method to compensate for microjog error induced by localized...

Details Method to compensate for microjog error induced by localized... Method to compensate for microjog error induced by localized...

2007-09-18

2007-09-18

Sniezek, Andrew L. (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S077080, C360S077020

Reexamination Certificate

active

10777778

ABSTRACT:
A method of reducing microjog errors in a disk drive having a data recording disk with data tracks and a transducer head positionable on the tracks. The head includes a writer element offset from a reader element. To reduce microjog errors, track squeeze is measured at a number of locations across the surface, wherein the squeeze is due to mis-positioning of the track relative to neighboring tracks. A microjog distance for the destination track is provided, and a microjog correction value based on the measured track squeeze is calculated. The correction value is applied to the microjog distance to obtain a corrected microjog distance that reduces microjog errors due to track squeeze.

REFERENCES:
patent: 6067205 (2000-05-01), Mathews et al.
patent: 6549362 (2003-04-01), Melrose et al.
patent: 6965491 (2005-11-01), Perlmutter et al.
patent: 7193809 (2007-03-01), Allen
patent: 2002/0039247 (2002-04-01), Bi et al.
patent: 2002/0067567 (2002-06-01), Szita

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