Apparatus and method for tape velocity and tension control in a

Details Apparatus and method for tape velocity and tension control in a Apparatus and method for tape velocity and tension control in a

1989-11-24

1991-05-07

Jillions, John M.

Winding, tensioning, or guiding

Strand tensioning device

Tortuous course

242 7551, 242203, 318 7, 360 7314, G11B 1532, B65H 5938

Patent

active

050129899

ABSTRACT:
In a capstanless tape transport, practice of the invention provides substantially constant tape tension when tape is spooled from a supply reel to a take up reel over the tape's entire length, for either direction of tape travel. The tape velocity is maintained constant by a closed loop velocity servo controlling the current applied to one of the reeling motors, and the tape tension is maintained substantially uniform by applying a current derived in an open loop manner to the other motor, such that the sum of the currents to the two reeling motors equals a constant.
The invention may be implemented either utilizing analog control or digital control of the reeling apparatus.

REFERENCES:
patent: 4256996 (1981-03-01), Brooks et al.
patent: 4400745 (1983-08-01), Shu
patent: 4525654 (1985-06-01), Tajima et al.
patent: 4696439 (1987-09-01), Sukigara et al.

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