| 摘要 |
A method for restoring the head to the track 0 in a disk drive unit which utilizes a stepping motor to position the head, the method comprising positioning the head to a position outside track 0 by exciting the stepping motor; returning the head thereafter toward an inner side to detect a position where the track 0 is found wihin a cycle of an excitation phase of the stepping motor; positioning the head at a position separated from the outer-most track 0 by a preset number of steps; and then controlling a current ratio to effect an excitation on a preset excitation phase, thereby positioning the head to the position over the track 0.
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