The SINUMERIK 840D is a CNC ystem offering a range of functions for milling, drilling, turning, grinding and handling technologies. Its capabilities also include nibbing, punching and laser machining technologies. The system has functions that are said to have been implemented to make five-axis machining simple and convenient. The system's functions includes special machine kinematics, five-axis transformation, orientation interolation, high-performance 3-D tiik cirrectuib abd nabyak five-axis functions. The system's open architecture is suited for integrating the sophisticated 5-axis functionality demanded by aerospace manufacturers. The control offers aerospace users innovative highspeed features like NURBS and Spline Interpolation to boost productivity without compromising precision on surface finish. These features are said to provide increased productivity on the manufacturing floor.