Affordable Access

Publisher Website

The measurement of in-situ wear of video heads

Tribology International
Publication Date
DOI: 10.1016/0301-679x(90)90031-j
  • In-Situ Wear
  • Video Heads
  • Iron-Oxide-Based Tape
  • Chromium-Dioxide-Based Tape


Abstract A method of measuring in-situ wear of video heads which determines the variation in wear along the surface of the video head is described. Knoop diamond indentations are positioned along the head, either side of the magnetic gap, enabling wear rate to be monitored at several positions. Virgin tape is run over the heads in the form of standard E180 cassettes and the wear occurring at each indentation position is derived from the reduction in length of the main diagonal. Wear rate is plotted against the position of the indentations. This describes the variation in wear along the head and therefore the conformation of the tape to the head. The technique has been used to study the wear of video heads with three types of tape sample: two iron-oxide-based formulations, with either Al 2O 3 or Cr 2O 3 added as head cleaning agents, and one chromium-dioxide-based tape. Little difference was found between the performances of the iron oxide tape samples. The chromium dioxide sample, however, produced wear some five to six times greater than the iron oxide tapes.

There are no comments yet on this publication. Be the first to share your thoughts.


Seen <100 times

More articles like this

In situ accelerated micro-wear — A new technique t...

on Surface and Coatings Technolog... Jan 01, 2010

Thermal sensor for in situ flying height measureme...

on Tribology International Jan 01, 2005

In situ granular charge measurement by free-fall v...

on Review of Scientific Instrumen... February 2013

Innovative tribometer forin situspectroscopic anal...

on Journal of the Mechanical Beha...
More articles like this..