G - Physics – 05 – D
Patent
G - Physics
05
D
341/44.2
G05D 13/62 (2006.01) G05D 15/01 (2006.01) G11B 15/46 (2006.01)
Patent
CA 1096472
S0956 TAPE CONTROL APPARATUS ABSTRACT OF THE DISCLOSURE Apparatus for controlling the speed, direction and tension of tape transported between a supply reel and a take-up reel. First and second drive motors are coupled to the supply and take-up reels for applying oppositely directed torques thereto, thereby bi-directionally driving the tape between these reels and applying back-tension to the driven tape. A speed detector detects the transport speed of the tape and generates a speed control signal proportional thereto. Torque voltage generators are responsive to the speed control signal for generating first and second torque voltages which are deter- minative of the torques respectively applied to the supply and take-up reels by the drive motors, the first and second torque- voltages changing differentially with respect to each other as the speed control signal changes. The torque voltages are applied to motor drive means which is responsive to such torque voltages for producing first and second drive signals which, in turn, are applied to the drive motors to control the torque applied by the drive motors to the supply and take-up reels, whereby the tape is transported at a substantially constant speed. A command signal generator generates command signals to establish the speed and direction at which the tape is trans- ported, and the first and second torque voltages are adjusted in response to the command signals to differentially change the drive signals produced by the motor drive circuit so as to differen- tially change the torques applied by the drive motors to the. supply and take-up reels. -i-
287568
Gowling Lafleur Henderson Llp
Sony Corporation
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