THIS PAPER DISCUSSES THE CONTROLLER OF THE CNC MACHINE TOOL DEVELOPED FOR MACHINING OF THE CYLINDRICAL FREE FORM SURFACE, SUCH AS GOLF CLUB DRIVER HEADS. THE CONTROLLER IS DESIGNED TO REDUCE THE TRACKING ERROR OF THE SERVOSYSTEMS DRIVING CONTROL AXES OF THE CNC MACHINE TOOL. THE EXPERIMENTAL RESULTS SHOW THAT THE DESIGNED CONTROLLER REDUCES THE TRACKING ERROR OF THE SERVOSYSTEMS LESS THAN ONE TENTH OF THOSE OF CONVENTIONAL SERVOSYSTEMS.
