Method and apparatus for calibration of a transducer flying heig

Details Method and apparatus for calibration of a transducer flying heig Method and apparatus for calibration of a transducer flying heig

1994-06-22

1996-10-22

Williams, Hezron E.

Measuring and testing

Instrument proving or calibrating

Volume of flow, speed of flow, volume rate of flow, or mass...

G01B 2130

Patent

active

055678645

ABSTRACT:
A method and apparatus for calibrating a flying height measurement instrument that: (1) precisely determines the actual height of a recording head over a disk, (2) is inexpensive, (3) permits the head whose flying height is to be measured to be used during the calibration procedure, and (4) is nondestructive to the calibration apparatus. In addition, the present invention can be used to calibrate different flying height measurement instruments and is independently verifiable. During the inventive calibration process, a special calibration slider is positioned over a measurement disk of a flying height measurement instrument in place of a slider which normally flies over the measurement disk when the flying height of a slider is being measured. The calibration slider has at least one support structure of a known height. During calibration of the flying height measurement instrument, the calibration slider is supported by the support structure over the measurement disk, such that the calibration slider is spaced apart from the calibration disk by the height of the support structure. The spacing is then statically determined. The result of the static measurement is used to plot the relationship between the output of the instrument during a dynamic measurement and the actual height of the recording head.

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