1 Move the workbench or spindle, according to the distance from the workpiece, the correct choice of movement speed, to prevent the movement of collisions occur too fast. 2 Programming in accordance with the actual situation to determine the correct processing technology and processing routes, to eliminate the lack of machining position or insufficient strength of the workpiece caused by scrap or cut off early. 3 the line before cutting must confirm that the program and the amount of compensation is correct. 4 Check the electrode wire tension is sufficient. When cutting the taper, the tension should be lowered to the usual half. 5 Check the feeding speed of electrode wire is appropriate. 6 According to the actual situation of the workpiece to choose the open processing or dense processing, in the premise of avoiding interference to minimize the nozzle and workpiece distance. In dense machining, the distance between the nozzle and the workpiece is usually 0.05~0.1mm. 7 Check the spray flow selection is reasonable, roughing the use of high-pressure jet flow, finishing with low-pressure jet flow. 8 Start cutting should pay attention to the judgment of processing stability, and timely adjustment when found bad. 9 in the process of processing, to constantly inspect the cutting conditions to supervise and find the problem immediately.