| 摘要 |
PURPOSE:To simplify a titled device and to save the cost of installation by connecting a speed detector to a motor connected to a table roll and installing a minimum-speed detecting circuit between it and a power source controller to control the speed by a single set of controller. CONSTITUTION:A table roll driving device is constituted of a variable frequency or variable voltage power-source 1, motors 2 connected parallelly to the source 1 to which table rolls 3 are connected respectively, speed detectors 5 for detecting the rotating speeds of motors 2, and a controller 8 for controlling the frequency or voltage of the source 1. A minimum speed is detected by the circuit 10 to control the speed of motor 2. Thus, the speed is controlled by a single set of controller 8. |
