| 摘要 |
A laser output control system for an NC laser in which a numerical control apparatus (CNC) and a gas laser oscillator are coupled together. There are provided a first output control mode and a second output control mode. In the first output control mode, a shutter is closed (S2) prior to starting the machining, and the laser is pre-oscillated to raise the temperature of a laser gas in order to maintain constant the temperature of the inner wall of the discharge tube (S3 to S6). When a machining instruction is input, the base discharge condition is once established (S8), the shutter is opened (S9), and the output instruction value is increased to produce laser beams. This makes it possible to realize the output control by taking advantages of a conventional shutter control system and a beam control system. In the second output control mode, the base discharge condition is established (S11) and the shutter is opened (S12) to effect the machining. The second output control mode is featured by energy saving, reduced heat generation and long life. This first and second output control modes can be selected by an operator depending upon the type of machining. |
