Method to detect the touch down of the flying head on disk

Details Method to detect the touch down of the flying head on disk Method to detect the touch down of the flying head on disk

2007-10-23

2007-10-23

Tran, Thang V. (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S069000, C324S210000

Reexamination Certificate

active

11364984

ABSTRACT:
A disk drive that contains a fly on demand head (FOD) and a process for determining contact between the FOD head and a disk. The head includes a heating coil that can receive various levels of power. The process includes using a routine to obtain head position estimate error data. A standard deviation of the estimate error data is then determined. Standard deviation values for estimate error data are generated for different power values and used to determine a contact point between the head and the disk.

REFERENCES:
patent: 7095587 (2006-08-01), Kurita et al.
patent: 7180692 (2007-02-01), Che et al.
patent: 11045436 (1999-02-01), None

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