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Title:
MAGNETIC TAPE CONTROL SYSTEM
Document Type and Number:
Japanese Patent JPS5538622
Kind Code:
A
Abstract:

PURPOSE: To reduce greatly the number of times of hunting of a tape by changing the torque of a reel motor after positioning the lower end of a tape loop in a fixed interval by turning or reversing the reel motor.

CONSTITUTION: While the lower end of tape 2 is between tape sensors 8 and 9, no signal is sent out from tape loop control circuit TRC to a constant current driver circuit. When the lower end of tape 2 is above sensor 8, circuit TRC sends out a take-up control signal to circuit CDC to turn reel motor M, thereby feeding tape 2. The moment the detection signal of sensor 8 is generated, it is inputted to terminals CL and (i) of a shift register to control the output of reel motor braking current control circuit MSC, thereby reducing the torque of motor M. When the lower end of tape 2 lowers below sensor 9, motor M is reversed to rewnd tape 2. At the point in time when sensor 9 does not detect tape 2 any more, a signal is inputted to terminals CL and (j) of register SR to increase the torque of motor M.


Inventors:
SAIJIYOU HIROAKI
OKAMURA EIJI
Application Number:
JP10935378A
Publication Date:
March 18, 1980
Filing Date:
September 06, 1978
Export Citation:
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Assignee:
FUJITSU LTD
International Classes:
B65H23/188; G11B15/58; (IPC1-7): B65H25/20; G11B15/58



 
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