Method and apparatus for storing and retrieving information

Details Method and apparatus for storing and retrieving information Method and apparatus for storing and retrieving information

G - Physics

11

B

352/30.3, 352/24

G11B 5/55 (2006.01)

Patent

CA 1204507

METHOD AND APPARATUS FOR STORING AND RETRIEVING INFORMATION Abstract of the Disclosure In a device for retrieving and recording (read/write) information on at least one rigid disk, a stepping motor servo system operated in an open-loop manner is provided to rapidly and accurately position read/write heads relative to the disk. A fixed guide shaft adjacent to and transverse to the motor shaft carries a carriage slidably thereon, preferably on oil impregnated bearings, the carriage member including a gear rack and the stepping motor having a pinion gear thereon interfacing with the gear rack. A preload bearing is urged against the carriage at a position between the guide shaft and the pinion gear such that the carriage is rotated around the guide shaft into engagement with the pinion gear at the rack portion there- of. The stepping motor is preferably fixed to the device chassis at a position and location spaced from the pinion gear a distance corresponding to the distance of a preferred spring steel head support arm utilized to carry the read/write head, to compensate for thermal expansion differences between the chassis material, and the spring steel head support arm.

440338

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