Apparatus for controlling a web transport system

Details Apparatus for controlling a web transport system Apparatus for controlling a web transport system

G - Physics

11

B

352/21.2, 341/44

G11B 15/43 (2006.01) B65H 59/00 (2006.01) G11B 15/54 (2006.01)

Patent

CA 1191929

APPARATUS FOR CONTROLLING A WEB TRANSPORT SYSTEM ABSTRACT OF THE DISCLOSURE Apparatus is provided for controlling a web transport system, such as a tape transport, of the type having supply and take-up reels for supplying and taking up the web, respectively, a tension control circuit for controlling the supply and take-up tension of the web, a web drive, such as a capstan, and a sensor for sensing the movement of the web as it is driven. The control apparatus includes a web drive detector for detecting the operation of the web drive and, particularly, the speed at which the web drive is driven. A comparator coupled to the sensor and the web drive detector compares the actual speed at which the web moves and the speed at which the web drive is driven to indicate when the speed at which the web moves differs from the speed at which the web drive is driven, such as when the web slips with respect to the web drive. An adjusting circuit coupled to the comparator adjusts the tension control circuit when the web speed differs from the web drive speed. -i-

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