Web transport capstan control system

Details Web transport capstan control system Web transport capstan control system

G - Physics

11

B

352/21.22

G11B 15/00 (2006.01) G11B 15/54 (2006.01)

Patent

CA 1122318

Abstract of the Disclosure A professional audio tape transport capstan control system includes a single capstan continuously engaging a length of tape to provide bidirectional motion control in all modes of operation. A D. C. capstan drive motor is directly coupled to the capstan and energized for precise control over tape motion. A hybrid servo switches between digital position phase lock vel- ocity control and analog constant acceleration control to provide both precise control over play speed and rapid acceleration. With acceleration to a stabilized play speed occurring in less than 0.5 sec an operator may treat the acceleration time as instantaneous for most applications. -2-

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