Method of determining a glide avalanche break point of a magneti

Details Method of determining a glide avalanche break point of a magneti Method of determining a glide avalanche break point of a magneti

1997-07-02

2000-02-22

Raevis, Robert

Measuring and testing

Surface and cutting edge testing

Roughness

G01B 1708

Patent

active

060266767

ABSTRACT:
A glide head with mounted PZT sensor is used to obtain a glide avalanche curve. The glide head is subsequently gradually decreased until the signal is extremely high. First, at least one resonance frequency of the glide head is determined. The frequency component of the PZT glide signal to each specific irregular peak is analyzed by using the speed of the glide head divided by the bump spacing, multiplied by a factor, m, where m is an integer number. The next step of the present invention is to determine a glide avalanche break point of the recording medium. Then, the glide avalanche point is determined in the region which is between the irregular peaks and the extremely high signal.

REFERENCES:
patent: 5488857 (1996-02-01), Homma et al.
patent: 5689064 (1997-11-01), Kennedy et al.

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