| 摘要 |
PURPOSE:To correct the upper limit value and the lower limit value of a fitting height by providing a sensor to detect an impact wave occurring due to the contact with a magnetic head and magnetic recording medium, changing the fitting height of the magnetic head and detecting a contact impact wave. CONSTITUTION:When a slider S is brought into contact with a rotating disk D, an impact wave is detected by an AE sensor F, and therefore, an impact detecting signal is amplified by an amplifier K, the impact detecting signal is amplified by an amplifier K, the impact detecting signal is measured by a measuring device and the rotating disk D is decided to contact with the slider S. Consequently, for an arm, when the fitting height is changed, it can be confirmed by the output signal of the AE sensor F that in the upper limit value and the lower limit value, the slider S is brought into contact with the disk D. Thus, the test method of a floating margin to assure then floating of a magnetic head can be obtained.
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