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A trajectory generation method which is based on NURBS interpolation is studied to improve the fitting accuracy and smoothness of non-circular cross section and obtain higher accuracy of the final non-circular profile control. After using the NURBS, the most optimized and smooth trajectory for the linear actuator can be obtained. For the purpose of machining the non-circular cross section by CNC ting, the fast response linear actuator has been used. The control algorithm which is compound control of proportional-integral-differential (PID) and iterative leing control has been developed for non-circular profile generation. By using the NURBS interpolation and the compound control of PID and iterative leing control, the final motion accuracy of linear actuator has been improved, therefore, the machining accuracy of the non-circular ting can be improved.