Transient temperature compensation for moving head disk drive

Details Transient temperature compensation for moving head disk drive Transient temperature compensation for moving head disk drive

G - Physics

11

B

352/21

G11B 5/012 (2006.01) G11B 5/55 (2006.01)

Patent

CA 1122703

77/422 TRANSIENT TEMPERATURE COMPENSATION FOR MOVING HEAD DISK DRIVE ABSTRACT A transient temperature compensation system for use in a magnetic disk drive comprised of both fixed and removable disks. The system includes first and second thermistors respectively mounted immediately adjacent the fixed and removable disks. The second thermistor is prefer- ably mounted for movement between an operative position and an inoperative position. In the operative position, the thermistor is positioned in very close proximity to the disk. In the inoperative position, the thermistor is spaced from the disk to permit sufficient clearance to enable the disk to be removed from the drive. The outputs of the two ther- mistors are used to develop a signal representing the temperature differential between the two discs which signal is supplied to the disk drive head positioning system. This signal is used to modify the positioning of the heads relative to the fixed disk to compensate for differences in the radial positions of corresponding tracks on the fixed and removable disks.

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