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TECHNICAL PAPERS

Numerical and Experimental Investigations of the Head/Tape Interface in a Digital Linear Tape Drive

[+] Author and Article Information
Sanwu Tan, Frank E. Talke

CMRR, University of California, San Diego, La Jolla, CA 92093-0401

J. Tribol 123(2), 343-349 (Jun 16, 2000) (7 pages) doi:10.1115/1.1352739 History: Received October 25, 1999; Revised June 16, 2000
Copyright © 2001 by ASME
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References

Hahn,  F., 1989, “Historical Perspective on Tape Head Contours,” Tribol. Mech. Mag. Storage Syst., VI, STLE SP-26, pp. 21–27.
Saliba, G., 1994, “Magnetic Head for Very High Track Density Magnetic Recording,” U.S. Patent, 5,307,217, April.
Cannon,  D. M., , 1986, “Design and Performance of a Magnetic Head for a High-Density Tape Drive,” IBM J. Res. Dev., 30, No. 3, pp. 270–277.
Dee,  R. H., Cates,  J. C., and Schmalhorst,  J. M., 1999, “Advanced Multi-Track Tape Head for High Performance Tape Recording Application,” IEEE Trans. Magn., 35, No. 2, pp. 712–717.
Baugh,  E., Swenson,  J., and Talke,  F. E., 1998, “Simultaneous Three-Wavelength Interferometry for Head/Tape Spacing Measurement,” J. Tribol., 120, pp. 549–553.
Tan, S., Garrettson, B., Talke, F. E., Kneeburg, D., and Judge, J., 2000, “Head-Tape Spacing Measurements for Digital Linear Tape Drives Using Three-Color Interferometry,” STLE Tribol. Trans., in press.
Stahl,  K. J., White,  J. W., and Deckert,  K. L., 1974, “Dynamic Response of Self-Acting Foil Bearing,” IBM J. Res. Dev., 18, No. 6, pp. 513–520.
Heinrich,  J. C., and Wadhwa,  S. K., 1986, “Analysis of Self-Acting Foil Bearings: A Finite Element Approach,” Tribology and Mechanics of Magnetic Storage Systems, STLE SP-21, III, pp. 152–159.
Lacey,  C., and Talke,  F. E., 1992, “Measurement and Simulation of Partial Contact at the Head/Tape Interface,” J. Tribol., 114, No. 4, pp. 646–652.
Lacey,  C., and Talke,  F. E., 1992, “The Effect of Head Wear and Tape Shear on the Head/Tape Interface,” Tribol. Mech. Magn. Storage Syst., STLE SP-35, VIII, pp. 29–34.
Wang,  E. L., Wu,  Y., and Talke,  F. E., 1996, “Tape Asperity Compliance Measurement Using a Pneumatic Method,” IEEE Trans. Magn., 32, No. 5, pp. 3732–3734.
Wu,  Y., and Talke,  F. E., 1996, “The Effect of Surface Roughness on the Head-Tape Interface,” J. Tribol., 118, pp. 376–381.
Wu,  Y., and Talke,  F. E., 1998, “Finite Element Based Head-Tape Simulation Including Head-Tape Surface Asperity Contacts,” IEEE Trans. Magn., 34, No. 4, pp. 1783–1785.
Tan,  S., Baugh,  E., and Talke,  F. E., 1998, “Measurement of Non-Elastic Asperity Compliance of Magnetic Tapes,” IEEE Trans. Magn., 34, No. 4, pp. 1726–1728.
Tan,  S., and Talke,  F. E., 1999, “Experimental Investigations of Asperity Compliance of Flexible Magnetic Medium,” IEEE Trans. Magn., 35, No. 2, pp. 770–775.
Bhushan,  B., and Tonder,  K., 1989, “Roughness-Induced Shear and Squeeze Film Effects in Magnetic Recording,” J. Tribol., 111, pp. 220–237.
Muftu,  S., and Hinteregger,  H. F., 1998, “The Self-Acting, Sub-Ambient Foil Bearing in High Speed, Contact Tape Recording With a Flat Head,” STLE Tribol. Trans., 41, pp. 19–26.
Lakshmikumaran,  A. V., and Wickert,  J. A., 1999, “Equilibrium Analysis of Finite Width Tension Dominated Foil Bearings,” ASME J. Tribol., 121, pp. 108–113.
Cook, R. D., Malkus, D. S., and Plesha, M. E., 1989, Concepts and Applications of Finite Element Analysis, Wiley, New York.
Quantum DLT University Handbook, 1997, Quantum Corporation.

Figures

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DLT-type three-bump head/tape interface
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Geometry model of the three-bump head
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Comparison of calculated and measured head/tape spacing profiles
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Air bearing pressure of the head/tape interface
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Comparison of measured and calculated head/tape spacing: (a) spacing as a function of tape tension; (b) spacing as a function of tape speed.
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Simulation of “tape tenting”
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DLT five-bump head/tape interface 20
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Model of the five-bump head/tape interface
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Head/tape spacing profiles of the central and the left island
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Pressure profiles of the central and the left island
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Effect of tape speed on the spacing of the five-bump head/tape interface
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Effect of tape tension on the head/tape spacing
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Effect of island radius on the head/tape spacing: (a) head/tape spacing; (b) air bearing pressure.
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Effect of island penetration on the head/tape interface: (a) head/tape spacing; (b) air bearing pressure.
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Effect of radius and penetration on the head/tape interface: (a) effect of island radius; (b) effect of island penetration.
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Spacing and pressure as a function of overall tape wrap angle: (a) head/tape spacing; (b) air bearing pressure.
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Definition of the overall tape wrap angle and the local tape wrap angle
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Spacing and pressure as a function of local tape wrap angle: (a) head/tape spacing; (b) air bearing pressure.

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