Frequency Domain Characterization of Take-Up Reel Air-Entrainment in Low-Tension and High-Speed Tape Transport

[+] Author and Article Information
P. D. Mathur, W. C. Messner

Carnegie Mellon University, 5000 Forbes Ave., Pittsburgh, PA 15213

J. Tribol 120(3), 554-558 (Jul 01, 1998) (5 pages) doi:10.1115/1.2834586 History: Received August 27, 1996; Revised August 01, 1997; Online January 30, 2008


Air entrainment in tape spooling is important because it affects the tape stacking quality and the dynamics for which the transport controller must be designed. Accurate estimates of the air film thickness between the layers of tape are difficult to obtain by direct measurement. In this paper, a new frequency domain method is presented where the length of the entrained air film is estimated by determining the spring constant of the unsupported tape span. Using multi-input single-output (MISO) frequency based system identification, the resonant frequency of the system associated with the longitudinal mode of the tape is derived. These data are compared to predictions from the well known nip height equation. The utility of these equations is discussed.

Copyright © 1998 by The American Society of Mechanical Engineers
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