Two motor servo system for a removable disk drive

Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head

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Details

360 7703, 360 7811, 360 7812, G11B 5596

Patent

active

052708861

ABSTRACT:
The invention provides an improved disk writing system capable of storing larger amounts of information than heretofore possible. The disk mechanism incorporates a dual function servomechanism which includes a voice coil motor for driving the read/write head over long distances relatively quickly, and a stepper motor for precisely positioning the read/write head once it is in the desired region.

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Lissner et al. "Disk File Actuator," IBM Technical Disclosure Bulletin, vol. 17, No. 10, Mar. 1975.

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