POSITION CONTROL METHOD FOR CNC LASER BEAM MACHINE

摘要

PURPOSE:To enable three dimensional laser machining at high speed by performing an interpolation by neglecting the movement of alpha axis and beta axis in controlling X, Y, Z axes and constituting so as to add the correction value for the movement of the alpha and beta axes. CONSTITUTION:When the locus (X, Y, Z) of the control point to be worked and the position (alpha, beta) of a nozzle are commanded, an interpolater 10 performs the interpolation of 5 axes at the same time. The interpolation of the X, Y, Z axes is performed by neglecting the movement of alpha axis and beta axis in the interpolator 10. The interpolation of the X, X, Z axes is therefore same as that of an ordinary numerical value control device and can be operated at high speed. A correction means 11 calculates the correction value X, Y, Z to be given to the X, Y, Z axes by the movement of the alpha and beta axes. This calculation can be operated at high speed and is simple compared with the case of performing the interpolation of five axes at the same time. An adder 12 controls a servomotor by taking the movement amt. of the X, Y, Z axes by adding the correction value X, Y, Z to the movement amt. of the X, Y, Z axes. The output of the interpolater 10 is given to the servomotor of the alpha and beta axes as it is.