| 摘要 |
PURPOSE:To improve the operability of a laser beam machine by once suspending gap control, reading detecting signals from a gap detector at positions before and after shifting a nozzle, obtaining a correcting factor based on the above signals and the shifting distance, correcting the detecting signal with the correcting factor and executing the gap control. CONSTITUTION:The nozzle 5 is stopped at a first position and the gap control with a control device 1 is once suspended. At the first position, a first detecting signal from the gap detector 8 is read. By transmitting the prescribed shift command to position control means for nozzle, the nozzle 5 is positioned to a second position shifted by the fixed distance from the first position. At the second position, a second detecting signal from the gap detector 8 is read. The correcting factor is obtd. from the fixed shifting distance and the first and second detecting signals. The detecting signal from the gap detector 8 is corrected with the correcting factor and the gap control is started. By this method, the machined accuracy of the laser beam machining can be improved. |
