| 摘要 |
<p>PURPOSE:To save the current consumption by receiving the output of a rotary speed information detecting means and that of a feeding side tape radius calculating means and performing the control of the feeding side reel motor. CONSTITUTION:The feeding reel driving control circuit 9 controlling the generated torque of the feeding side reel motor by the number revolution of the feeding side reel obtd. from a detector 5 for the number of revolutions of a feeding reel and the winding tape radius of the feeding side reel obtd. from a feeding side tape radius calculator 7 performs the control so as to generate a back torque gammaB from the reason giving a back tension to the tape, with compensating the shaft loss torque gammao becoming a brake torque for a feeding side reel motor 3 and a viscosity friction torque ROMEGAs. In this way the tape tension of the fastfeeding and rewinding times of the tape can surely be controlled at a fixed value and after securing a stable tape running, the electric power consumption of the winding side reel motor can be saved.</p> |
