Transducer access control system

Details Transducer access control system Transducer access control system

1989-02-02

1991-08-27

Envall, Jr., Roy N.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 31, 369 43, 369124, 360 7807, 360 7803, 360 7806, G11B 708, G11B 700

Patent

active

050439618

ABSTRACT:
A transducer access control system for use in a disk recording/reproducing apparatus for moving a transducer a required distance from its present position over a disk in the radial direction thereof, includes a linear motor for driving the transducer, a circuit for generating a distance signal indicative of the required distance for moving the transducer, and a calculator for calculating a half distance which is a half of the required distance. To move the transducer for the required distance D, the linear motor is operated at the velocity controlled in accordance with a reference velocity signal produced from a reference velocity generator. The reference velocity is determined such that, the reference velocity is maintained at a predetermined value during the movement of the transducer in the first half of the required distance, and gradually decreases during the movement of the transducer in the second half of the required distance.

REFERENCES:
patent: 4931889 (1990-07-01), Osafume

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