There are generally two approaches to the path of the engraving machine, namely, the four axis engraving machine video "arc approach" and "straight line approach". In the process of carving, the tool can only follow straight line segments or arcs (that is, straight line approximation and arc approximation). If the user's drawing contains other types of curves, the four axis precision engraving machine video system needs to separate them into straight line segments or arcs before calculating the tool path. Generally speaking, there is no difference in the processing speed between the four axis engraving machine video, the four axis engraving machine video, the tool four axis engraving machine video path generated by arc approximation and the four axis engraving machine video linear approximation. In the process of area carving, the four axis engraving machine video, the engraving machine manufacturer personnel suggest to select the arc four axis engraving machine video approximation, so as to achieve the maximum accuracy of the graphic size. When calculating the surface finishing path, By using straight line approximation, the phenomenon of over cutting of the machined surface caused by the error of arc approximation can be avoided.
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