Abstract

A refined technique using Acoustic Emission has been developed for use in head/disk interface contact detection. These refinements are focused on the design parameters of the Acoustic Emission electronics, amplification and filter settings, which permit accurate and repeatable contact detection measurements. A technique for determining the slider body natural frequencies is described in order that the proper filter design parameters can be determined. Experiments confirm the existence of these frequencies for a Al2O3TiC 50 percent slider are in excess of 600 KHz.

Issue Section:
Research Papers
Topics:
Acoustic emissions, Disks, Design, Filters, Electronics
1.
Kita, T., Kogrue, K., Mitsuya, Y., and Nakaishi, T., 1980 “New Method of Detecting Contact Between Floating-Head and Disk,” IEEE Transactions on Magnetics, Mag-15, No. 5, pp. 873–875.
2.
Yeack-Scranton, C. E., 1986 “Novel Piezoelectric Transducers to Monitor Head-Disk Interactions,” IEEE Transactions on Magnetics, Mag-22, No. 5, pp. 1011–1016.
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Jeong
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Natural Frequencies of Sliders and Transducers Used to Detect Slider-Disk Contacts
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 by The American Society of Mechanical Engineers
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