One is imitative shape control. Before wire cutting, a mold with the same shape as the workpiece is manufactured in advance. During processing, the workpiece blank and * mold are clamped on the machine tool workbench with clothing. During the cutting process, the electrode wire tightly sticks to the edge of the * mold for orbital movement, and then the workpiece with the same shape and precision as the * mold is cut;

The other is photoelectric marking control. Before line cutting, first draw a photoelectric marking diagram according to the part drawing according to a certain proportion. During processing, place the drawing on the photoelectric marking table of the machine tool. The photoelectric head on the marking table always follows the track of the ink line graph. Then, with the help of electrical and mechanical linkage, control the machine tool workbench and the workpiece to move in a similar shape relative to the electrode wire, Then cut out the workpiece with the same shape as the pattern;

The other is digital program control, which uses advanced digital active control skills to drive the machine tool to complete the processing according to the numerical control processing program prepared in advance according to the number of shapes of the workpiece before processing. There is no need to make pattern plates and no need to make enlarged drawings. Compared with the previous two control forms, it has higher processing accuracy and wider use scale. At present, more than 95% of WEDM machines at home and abroad have selected numerical control.