| 摘要 |
PURPOSE:To reduce the number of cables to an operation board by connecting in parallel a series circuit of a normal rotation circuit rectifier and the contact of an overrun limit switch and a series circuit of a reverse rotation circuit rectifier and the contact of an overrun limit switch, and connecting in series in a power supply system. CONSTITUTION:A normal rotation circuit rectifier 33 of a DC motor 22 and the contact of an overrun limit switch 24 which operates when exceeding a normal rotation specification range are connected in series, and a reverse rotation circuit rectifier 34 and the contact of an overrun limit switch 25 which opens when exceeding reverse rotation specification range are connected, the both series circuits are connected in parallel, and in series with a cable 47. Rectifiers 33, 34 are provided at the side of a DC motor 22, and limit switches 24, 25 are provided at an articulated portion of a manipulator 21. |
