| 摘要 |
PURPOSE:To satisfy simultaneously responsibility when gas pressure is changed and stable accuracy in a steady state by changing the value of parameter control in a gas pressure control system according to the operation process of an NC laser device. CONSTITUTION:A discharge excitation type gas laser oscillator is constructed so that gas pressures of the inside of a discharge tube 5 are different according to states of the start of discharging and of operation laser oscillations and it is combined with a computerized numerical control(CNC) device 11 in an NC laser device. Then, it is constructed so that control system proportional gain and integrating gain values of gas pressure are changed according to the operation process of the NC laser device. As the value of control parameter in the gas pressure control system is varied according to the operation process of the NC laser device, the control performance of gas pressure in the all processes improves all the more over conventional devices. Since the output of laser power becomes stable, its superior output improve the accuracy of parts processed by this laser. As even response times in the case of changing gas pressures are improved, times required for start-preparations of the laser oscillator are shortened. |
