Numerical control system for highly dynamic processes

A numerical control system for performing path interpolation calculations for the control of highly dynamic processes having different path contour geometries wherein a vector having a length L connects in linear form a first point P1 to a second point P2, said first and second points being located in three dimensional Cartesian space having axes x, y, and z, length L having Cartesian components X, Y and Z and being subject to an angular rotation C about the z axis, the system also having process parameters S and K wherein S is an address identifying the parameter to be modified and K identifies the modified parameter, said system comprising:

• a coarse interpolator means for performing coarse interpolations of and outputting path elements L, X, Y, Z and C and the parameters S and K between path increments wherein said course interpolations are a function of the path contour geometry but are independent of a time grid;
• a master fine interpolator means for performing fine interpolations of said path elements and parameters and including an intermediate memory and being connected downstream from the course interpolator means and receiving, intermediately storing, subsequently processing the coarse interpolations from said coarse interpolator means, and outputting said path elements and parameters as fine interpolations, wherein there is no joint fixed grid frame for data exchange between the coarse interpolator means and the fine interpolator means;
• and
• control means operating in time independence from the coarse interpolator means for controlling the fine interpolator means so that said memory thereof performs fine interpolation steps and the outputting of parameters S and K in real time.