Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the record
Patent
1995-12-06
1998-09-15
Psitos, Aristotelis M.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the record
360 7314, 360 743, 242334, G11B 1543
Patent
active
058088245
ABSTRACT:
A capstanless tape feed control system of a reel-drive type is capable of accurately detecting the respective working radii of a supply reel and a take-up reel and the total length of the tape, of efficiently controlling tape speed and of preventing damage to the tape. The tape feed control system calculates the working radii of the supply reel and the take-up reel and the total length of the tape while the leading end of the tape is moving toward the take-up reel, and detects tape speed on the basis of data representing the total length of the tape and the radius ratio between the supply reel and the take-up reel. The tension of the tape and the reel driving torque are detected while the tape is being fed and the working radii of the supply reel and the take-up reel are calculated on the basis of the tension and the reel driving torque. A tape loading operation and a tape unloading operation are performed after the leading end of the tape has been pulled out from the take-up reel, with the supply reel being held stationary and a predetermined back tension being applied to the tape by the take-up reel.
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Fujita Kouji
Higuchi Shigemitsu
Kaku Nobuyuki
Kaniwa Kouji
Habermehl James L.
Hitachi , Ltd.
Psitos Aristotelis M.
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