Fly height adjustment in magnetic storage system

Details Fly height adjustment in magnetic storage system Fly height adjustment in magnetic storage system

1994-10-11

2000-05-02

Sniezek, Andrew L.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

G11B 560

Patent

active

060579757

ABSTRACT:
A method and apparatus for adjusting fly height between a disc surface of a magnetic storage system disc and a slider supported on a flexure arm in a magnetic disc drive. The slider carries a transducing head. The disc drive is rotated at a reduced testing RPM. The flexure arm is heated using a laser to achieve a desired flexure arm bend which corresponds to a desired fly height. Desired bend is achieved at the point when the slider is just in contact with asperities on the disc surface. Following heating, the disc is operated at a normal RPM rate of rotation which is greater than the testing RPM, thereby insuring that the slider flies in close proximity to the disc surface but without contacting the disc surface. Contact between the slider and the disc surface is determined by detecting acoustic noise on the flexure arm.

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