目前,数控线切割机床在我国已经相当普及了。在程序编制工作中,人们往往忽视斜线在45°时选择其计数方向的重要问题。以往都普遍认为:斜线正好在45°线上(即Xe=Ye),计数方向可任意选取。这种认识是有问题的,实际是不可以任意选取的。现在以第一象限为例,从图1中可以看出,需要加工的斜线OA,其终点A的座标为X=5毫米,Y=5毫米。当计数方向选取Gx时,由于是采用逐步加工法。加工点到达A′时,X方向已加工了5毫米,表示到了终点,该段加工结束,而Y方向只移动了4.999毫米,离终点A At present, CNC WEDM has been quite popular in our country. In the process of programming, people often overlook the important question of selecting the counting direction when the oblique line is at 45 °. In the past generally agreed that: slash just at 45 ° line (ie, Xe = Ye), the counting direction can be arbitrarily selected. This kind of understanding is problematic and can not be arbitrarily chosen in practice. Taking the first quadrant as an example, as can be seen from FIG. 1, the oblique line OA to be machined has the coordinate of the end point A of X = 5 mm and Y = 5 mm. When counting direction select Gx, because it is the use of step-by-step processing. When the machining point reaches A ’, the X direction has been machined 5 mm, indicating that the end point, the end of the processing, while the Y direction only moved 4.999 mm away from the end point A