Air Bearing Force Measurement of Pico Negative Pressure Sliders During Dynamic Unload

[+] Author and Article Information
M. Chapin, D. B. Bogy

Computer Mechanics Laboratory, Department of Mechanical Engineering, University of California, Berkeley, CA 94720

J. Tribol 122(4), 771-775 (Jul 06, 1999) (5 pages) doi:10.1115/1.1286151 History: Received February 10, 1999; Revised July 06, 1999
Copyright © 2000 by ASME
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Jeong,  T. G., and Bogy,  D. B., 1992, “An Experimental Study of the Parameters that Determine Slider-Disk Contacts During Dynamic Load-Unload,” ASME J. Tribol., 114, No. 3, pp. 507–514.
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Cam-driven vertical L/UL mechanism with strain arm force transducer
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Radial profile of L/UL cam
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Two calibration methods: (a) calibration for forces located at the air bearing; (b) calibration for forces located on the ramp
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ABS design for the slider used in the study
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Raw force data for a typical unload process; 3000 rpm, 0.5 mm/s unload speed
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Processed unload force history at 3000 rpm and an unload speed of 11.25 mm/s
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Dependence of lift-off force on disk rpm and unload velocity
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Force-displacement curve, regional system stiffness shown
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Simulated force history at 3000 rpm and an unload speed of 11.25 mm/s



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