| 摘要 |
An off-set signal provided from an off-set detector is stored in a memory. When a head is positioned on a data track, an off-set signal stored in the memory is read out to correct the head position and position the head to the center of the data track, thus effecting accurate reading and writing of data. An off-set generator feeds the servo system with a dummy off-set signal for producing an off-set correction signal, whereby the servo system corrects the off-track of the magnetic head.
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