Process for determining data disk track centers
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United States of America Patent
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-
Mar 28, 1989
Issued Date -
N/A
app pub date -
Jul 24, 1987
filing date -
Jun 2, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A process for determining the center of data disk tracks. The transducer head is positioned to one side of a track. The head repeatedly reads the track and microsteps across the track. The number of microsteps taken at the position on each side of the center of the track where a certain number of error correction code errors occur, are designated as boundaries of that track. The center of the track is then calculated as being half-way between the boundaries. By using the microstep off-sets for the centers of two tracks on a data disk, a correction factor can be calculated to compensate for thermal expansion of the data disk.
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