| 摘要 |
<p>PURPOSE:To make easy the adjustment of operation limit position of arm with a sumple construction, by comparing the output voltage of the potentiometer interlocking with the tension arm with the set voltage corresponding to the arm operation limit position. CONSTITUTION:The potentiometers 12 and 22 are linked with each fulcrum shaft of the tension arms 11 and 21, each one end is connected to the DC power supply, and the voltage corresponding to the rotational angle of the arm is produced. Each output voltage is fed to the drive circuits 13 and 23 of the supply reel drive motor 14 and winding reel drive motor 24. Further, the output voltage of the meters 12 and 22 is given to the comparison circuits 151, 152, and 251, 252 and it is compared with the set voltage of the voltage generators 161, 162 and 261 262. The voltage generators produce the set voltage equal to the output voltage of the potentiometer when the arm is positioned at the operation limit positions A1, A2 and B1, B2.</p> |
