| 摘要 |
PURPOSE:To make easier the regulation of maximum slewing speeds by enabling maximum applied voltage to be set and varied by automatically operating a solenoid type proportional control valve for operating the slewing base in such a way as to meet the operating conditions of an operating lever capable of detecting the direction and amount of operation. CONSTITUTION:A controller 13 to automatically operate a solenoid type proportional control valve 11 for operating a slewing base 2 on the basis of information from the potensiometer 10 of an operating lever 9 is provided to the drive circuit 12 of the valve 11. A regulator 15 is provided in an electric circuit 14 connecting the controller 13 with the circuit 12, and the ratio between the signal voltage from the controller 13 and input signal voltage to the circuit 12 is permitted to be set and varied. By the setting and varying operations, maximum applied voltage of the input voltage signal to the circuit 12 is set and varied, and the maximum slewing speed is electrically regulated by limiting the maximum working range of the valve 11. |
