NDLI: Asymmetrically Wrapped Flat-Profile Tape

Content Provider	Springer Nature Link
Author	Engelen, Johan B. C. Lantz, Mark A.
Copyright Year	2015
Abstract	In this work, we study the friction and spacing between a magnetic data storage tape and a recording head. The tape–head friction force and magnetic spacing are measured as a function of the angles with which the tape is wrapped around the read/write head at 2 and 6 m s$^{−1}$ tape transport velocity. It is found that the friction force can be described as a linear function of the leading and trailing wrap angles, where the friction force increases for increasing wrap angles. The analysis treats the total friction force as the sum of three components resulting from (1) the leading edge, (2) the head surface, and (3) the trailing edge. Coefficients of friction are calculated for each of the three components from experimental data. The leading edge and head surface components are both dependent on the leading-edge wrap angle and independent of the trailing-edge wrap angle, whereas the trailing-edge component is only dependent on the trailing-edge wrap. In addition, the estimated magnetic spacing is found to decrease with increasing leading-edge wrap angle, but is independent of the trailing-edge wrap angle, even for negative trailing-edge wrap angles. Hence, the trade-off between friction and spacing can be optimized through judicious choice of the wrap angles. In addition, we find that a significant portion of the friction is due to edge friction (as high as 70 % in the case of symmetric wrap). Therefore, we conclude that modifications to the head surface topography to reduce the contact area may not result in a significant reduction in head–tape friction.
Starting Page	1
Ending Page	8
Page Count	8
File Format	PDF
ISSN	10238883
Journal	Tribology Letters
Volume Number	59
Issue Number	1
e-ISSN	15732711
Language	English
Publisher	Springer US
Publisher Date	2015-05-31
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Sliding contact friction Boundary lubrication friction Magnetic data storage Magnetic data recording heads Tape–head friction Magnetic spacing Tribology, Corrosion and Coatings Surfaces and Interfaces, Thin Films Theoretical and Applied Mechanics Physical Chemistry Nanotechnology
Content Type	Text
Resource Type	Article
Subject	Surfaces, Coatings and Films Mechanics of Materials Mechanical Engineering Surfaces and Interfaces

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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