NDLI: An overview of glide testing

Content Provider	IEEE Xplore Digital Library
Author	Nayak, U.V. Lee, C.K. O'Sullivan, T.C. Hernandez-Fernandez, J. Gonzalez, D.
Copyright Year	1965
Abstract	Low flying air-bearings, "sliders," with contact sensors are used to "glide" test magnetic recording disks to be free of asperities above a predetermined height. A technical overview of the considerations necessary for accurate glide testing is illustrated by the example of an experimental flat plate PZT sensor, with electrodes divided into quadrants, to detect asperity contact. The flat plate PZT sensor detects the slider dynamic pitch, roll, and vertical vibrations of the air bearing by contact with asperities of sufficient mechanical stiffness. The sensor also detects contact by the extremely sensitive response of the resonant vibrations of the PZT/slider structure. Different linear combinations of the signal from the quadrants show mode selection based on mode symmetry. The signal response for increasing asperity interference is characterized for specific modes and a mode can be chosen by the appropriate linear combination of the signals from the quadrants. Calibration of the glide slider trailing edge flying height and roll using contact with artificial bumps of different heights is necessary for accurate glide testing. One can map the entire disk surface using the contact signal from both the air-bearing response and the bending mode response simultaneously to identify mechanically "stiff" asperities.
Sponsorship	IEEE Magnetics Society
Starting Page	729
Ending Page	734
Page Count	6
File Size	830460
File Format	PDF
ISSN	00189464
Volume Number	39
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-03-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Testing Magnetic sensors Mechanical sensors Vibrations Magnetic recording Electrodes Sensor phenomena and characterization Resonance Interference Calibration
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
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
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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