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A track locating servo system utilizing the data heads as absolute position transducers

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1 Author(s)
B. McKnight ; Hewlett Packard, Boise, Idaho

Magnetic transitions may be compactly written in the normally unused deadspace between the data sectors on each data surface of a moving head disc drive, which may be read by ordinary data heads to obtain absolute position information for use by the track locating servo. A track following system which complements the track locating system is briefly described. Implementation of these techniques eliminates both the need for a servo surface or external encoder, and troublesome reference surface to data surface mechanical tolerance problems.

Published in:

IEEE Transactions on Magnetics  (Volume:14 ,  Issue: 4 )