Tracking system for controlling the radial positioning of a tran

Details Tracking system for controlling the radial positioning of a tran Tracking system for controlling the radial positioning of a tran

1983-03-24

1985-12-31

Cardillo, Jr., Raymond F.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 33, 369 41, 369 44, 369 46, 360 77, 360 78, 318593, 318617, G11B 700, G11B 2108, G11B 2110

Patent

active

045625620

ABSTRACT:
A data track searching device capable of switching between two modes; one being the rough searching mode in which a transducer is displaced at a high velocity to a desired track and the other being the fine searching mode which follows the rough searching mode and in which the transducer is displaced at a relative low velocity and positioned over the proper or desired track. The operating point of a tracking element is shifted or deviated as a result of the high-velocity displacement of the transducer in the rough searching mode so that stable searching cannot be ensured. According to the present invention, therefore, the acceleration of the transducer in the rough searching mode is detected and a signal representative of the thus detected acceleration is applied to the tracking element so that the shift or deviation of the operating point of the tracking element can substantially made nil.

REFERENCES:
patent: 3924268 (1975-12-01), McIntosh et al.
patent: 4106058 (1978-08-01), Romeas et al.
patent: 4236232 (1980-11-01), Jansen et al.
patent: 4310914 (1982-12-01), Riddle

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