Application Of LDV And LDA To Tribological Studies In Magnetic Recording Disk Drives

D. B. Bogy; M. Suk

doi:10.1117/12.939775

10 September 1987 Application Of LDV And LDA To Tribological Studies In Magnetic Recording Disk Drives

D. B. Bogy, M. Suk

Proceedings Volume 0746, Industrial Laser Interferometry; (1987) https://doi.org/10.1117/12.939775
Event: OE LASE'87 and EO Imaging Symposium, 1987, Los Angeles, CA, United States

Abstract

We study the motion of a magnetic recording disk drive read/write slider as it drags in contact with thin film and particulate media disks. The out-of-plane displacement of the slider is measured with a laser-Doppler vibrometer (LDV), and its in-plane component is detected with a laser-Doppler anemometer (LDA). One goal is to determine if the motion of a slider/suspension that is mounted on a strain gage transducer arm is substantially different from that in a production system during constant speed sliding. Another is to verify that the vibrations detected by the strain gage transducers are actually related to motion of the slider. In addition to obtaining answers to these questions, we observe that the motion of a slider in contact sliding is indicative of the topography of the disk surface. A track "signature" is obtained, and changes in this signature may be an early indicator of disk wear.

Citation Download Citation

D. B. Bogy and M. Suk "Application Of LDV And LDA To Tribological Studies In Magnetic Recording Disk Drives", Proc. SPIE 0746, Industrial Laser Interferometry, (10 September 1987); https://doi.org/10.1117/12.939775

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