Winding – tensioning – or guiding – Unwinding and rewinding a machine convertible information... – Carrier speed or tension control
Patent
1996-07-16
1998-02-24
Darling, John P.
Winding, tensioning, or guiding
Unwinding and rewinding a machine convertible information...
Carrier speed or tension control
B65H 5938, G11B 1546
Patent
active
057204420
ABSTRACT:
A load torque imposed on a take-up reel motor is estimated from the current in a take-up reel motor and the rotational speed of the take-up reel. The current value supplied to the take-up reel motor is adjusted on the basis of the estimated load torque. A tape feed rate detected is compared with a reference signal produced from a target tape speed signal. On the basis of the comparison result, the torque of the take-up reel motor is controlled in such a manner that the tape feed rate assumes a predetermined value. The gain of a speed control system for controlling the rotational speed of the take-up reel is adjusted on the basis of a detected period of tape speed.
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Iwakura Masao
Kobata Shigeyuki
Nakagawa Shinsuke
Sakai Kazuo
Yanagihara Norihisa
Darling John P.
Hitachi , Ltd.
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