| 摘要 |
PURPOSE:To work precisely to desired dimension even when the length of light path changes by changing the quantity of offset of a working head according to spot diameter of laser light on a work that changes with change of the length of light path from a laser oscillator to a condensing device. CONSTITUTION:As displacement of a working head in X and Y directions is detected by an NC device, the distance d1 from the laser oscillator 1 is calculated by a light path length calculating circuit 21 basing on the X, Y displacement. Then, the calculated value is inputted to a spot diameter calculating circuit 22, and spot diameter W1 is calculated. This value is inputted to an adder circuit 23a as the quantity of offset. X-axid displacement of the program of the NC device is also inputted to the adder circuit 23a. At this time inputting is made to the adder circuit 23a or 23b depending on whether the direction of offset is right or left or up or down, and an X-axis shifting stand 8X or a Y-axis shifting stand 9Y is moved. |
