<Li> Voronoi diagram approach: In voronoi diagram approach, the pocket boundary is segmented and voronoi diagram is constructed for the entire pocket boundary . These voronoi diagrams are used for generating the tool path for machining . This method is considered to be more efficient and robust . Moreover, it avoids topological problems associated with traditional offsetting algorithms . </Li> <P> In this approach, the tool travels along a gradually evolving spiral path . The spiral starts at the center of the pocket to be machined and the tool gradually moves towards the pocket boundary . The direction of the tool path changes progressively and local acceleration and deceleration of the tool are minimized . This reduces tool wear . </P> <Ul> <Li> <P> Zig - zag tool path </P> </Li> <Li> <P> Zig tool path </P> </Li> <Li> <P> Contour - parallel tool path </P> </Li> <Li> <P> Curvilinear tool path </P> </Li> </Ul> <Li> <P> Zig - zag tool path </P> </Li>

Describe the main features of the milling machine