| 摘要 |
A METHOD FOR OBTAINING RELATIVE POSITIONAL RELATIONSHIPS BETWEEN A READ-ONLY HEAD (7) FOR READING DATA FROM AN ORIGINAL DISK (3) AND SERVO HEADS (10i) ON EACH SURFACE OF MAGNETIC DISKS (COPY DISKS (4)), IN A MAGNETIC DATA WRITING APPARATUS (DISK SERVO WRITER) THAT STACKS COPY DISK (4) AND A ORIGINAL DISK (3) TO ROTATE THE DISKS (4,3) UNITARILY.THE APPARATUS INCLUDES A ROTARY POSITIONER (2) ON THE PERIPHERY OF THE COPY DISKS (4) AND READ-ONLY DISKS (3),STACKING THEV READ –ONLY HEAD (7) AND SERVO HEADS (10i) ROTATABLY.THE APPARATUS CAUSES THE SERVO HEADS (10i) SIMULTANEOUSLY TO WRITE SERVO DATA TO RESPECTIVE ASSIGNED TRACK RANGES.THE METHOD INCLUDES STACKING CALIBRATION DISKS (14) STORING SERVO DATA IN PLACE OF THE COPY DISKS (4) IN A COAXIAL RELATION WITH THE READ-ONLY (7), IN ADVANCE OF WRITING MAGNETIC DATA TO THE COPY DISKS (4). USING THE CALIBRATION DISKS (14),RELATIVE POSITIONAL RELATIONSHIP ARE OBTAINED AS BETWEEN RHE ADDRESSES (R,®) THAT THE READ-ONLY HEAD (7) READS OUT FROM THE ORIGINAL DISK (3) AND THE ADDRESSES (r,ǿ,) THAT SERVO HEADS (10) READ OUT FROM CALIBRATION DISKS (14) AT THE SAME TIME THAT READ-ONLY HEAD (7) READS OUT THE ADDRESS (R,®) THEREOF.
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