Experimental evaluation of a head assembly by using a piezoelectric tripod shaker

Author

Mori, K. ; Shimizu, J. ; Masukawa, T. ; Takahashi, T. ; Takeuchi, Y. ; Imai, S.

Author_Institution

Hitachi, Ltd., Kanagawa, Japan

Volume

29

Issue

6

fYear

1993

fDate

11/1/1993 12:00:00 AM

Firstpage

3921

Lastpage

3923

Abstract

A piezoelectric tripod shaker and a seek-acceleration simulator system developed to evaluate the dynamic characteristics of a head assembly in a hard disk drive and to investigate the effects of vibration during the seek period are discussed. This shaker has three orthogonally placed piezoelectric devices that use flexible mechanisms to avoid interference from each other´s vibration. The shaker has a displacement of 4 μm, a frequency range of 10 kHz, and a mode isolation of over 20 dB. Experimental results of a head assembly, with a standard mini slider shaken in various directions, show that the sway mode (f3 mode) of the lateral (Y-shake) acceleration is dominant. The flying-height fluctuation is obtained during the seed period by using the seek-acceleration simulator system

Keywords

dynamic testing; hard discs; magnetic heads; piezoelectric devices; dynamic characteristics; flying-height fluctuation; frequency range; hard disk drive; head assembly; lateral acceleration; mode isolation; orthogonally placed piezoelectric devices; piezoelectric tripod shaker; seek period; seek-acceleration simulator system; sway mode; Acceleration; Assembly systems; Disk recording; Fluctuations; Interference; Magnetic heads; Magnetic recording; Piezoelectric devices; Resonant frequency; Vibrations;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.281343

Filename

281343