| 摘要 |
A method of imparting a predetermined tension to a tape transported at a predetermined velocity from one to the other of the reels mounted on a pair of reel spindles at least one of which is rotated by a motor to have a rotational torque imparted thereto, wherein detection is made of the number of revolutions of the reel spindle rotated by the motor, a signal resulting from said detection is frequency-voltage converted, then the thus converted signal is converted into a logarithmic signal, subsequently the logarithmic signal is subtracted from a reference voltage, and a signal resulting from the subtraction is supplied to the motor to thereby impart a predetermined tension to the tape.
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