Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Tape record
Patent
1983-06-23
1985-10-22
Wolff, John H.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Tape record
360 61, 360 62, 360 741, 360137, 318 54, 318256, 318265, G11B 1518, G11B 1902, H02P 760, H02P 122
Patent
active
045492336
ABSTRACT:
A position control system for controlling a motor-driven mechanism capable of occupying a plurality of specified positions comprises a plurality of switches for specifying a position to be occupied by the mechanism and an encoder for generating a specified position signal representative of the specified position and a loading circuit for providing a present position signal representative of the position presently occupied by the mechanism. A read-only memory circuit uses the specified and present position signals to provide a control signal for controlling the motor to move the mechanism to a particular position and a comparison signal and a particular position signal indicative of that particular position. A position detector responsive to the position of the mechanism provides a detection signal representative of the particular position when the mechanism reaches it. A comparator compares the comparison signal from the memory circuit with the detection signal and provides a match signal to the loading circuit when they coincide. In response to the match signal the loading circuit loads the particular position signal into the memory circuit as the present position signal. If the particular position signal matches the specified position signal, the memory circuit provides a control signal that stops the motor. If the particular position does not match the specified position signal, the memory circuit provides a control signal to actuate the motor again. The illustrated embodiment of the system provides a tape recording and reproducing apparatus with four different operating modes.
REFERENCES:
patent: 3891911 (1975-06-01), Frentress
patent: 4272792 (1981-06-01), Nakamichi et al.
patent: 4348701 (1982-09-01), Kanayama et al.
patent: 4390918 (1983-06-01), Matsumoto
patent: 4422107 (1983-12-01), Motoyama
Inagaki Masaomi
Nakatsuyama Takashi
Teranishi Hiroshi
Eslinger Lewis H.
Sinderbrand Alvin
Sony Corporation
Urcia Benjamin
Wolff John H.
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