沿加工路线返回G92指定的起点。如图所示，图中实线轮廓为切割路线，虚线表示M70沿原路返回起点。

例：图8-9的M70所的程序如下：

G92 X0.0 Y0.0；

G41 G91 G01 Y5.0；

X-2.5；

Y10.0；

X10.0；

Y-10.0；

X-2.5；

G40 Y-2.5；

M70；

M30；

％

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