Figure 1-1; ①-main machine; ②- CNC controller

1. CNC controller

CNC controller is composed of CNC system and impulse power system.

① CNC system includes control system and auto programming system. Kingred’s wire cut EDM Controller is equipped with brand PC, which has wire cut EDM machining control and program software, it can design machining track, to realize automatic control of whole machining process. , see figure 1-10,

Figure 1-10

② Impulse power system, the impulse power source of CNC high speed feed wire cut EDM machine is also called high frequency power, it is the key part of machine, impulse power system convert AC electrical current to high frequency impulse power, to provide a series of rectangular pulse with different frequency width. Impulse power system is very important to wire cut EDM machine, it is the main reason to affect machining performance and quality of machine. It is relative to machining speed and surface finish directly. Impulse power source of CNC high speed feed wire cut EDM machine should be: (1) peak current should be proper; (2) width of high frequency is adjustable; (3) frequency of impulse should be as high as possible; (4) parameters of impulse is adjustable in a large range.  See Figure 1-11, the controller of Kingred’s CNC wire cut EDM machine.

Figure 1-11

1. Wire cut EDM machine is able to machine material, with high hardness, high strength, high fragility and high tenacity, which is not easy to be or can’t be machined by conventional method, even some semi-conductive materials are also can be processed by wire cut EDM machine.
2. Thanks to tiny size of electrode wire, wire cut EDM can machine small abnormal shape holes, small gap or job with complicated shape.
3. There is very little heat impact on the surface of workpiece, suitable to process some heat sensitive material; at the same time, as impulse energy concentrate on very small area, machining accuracy is higher.
4. During machining, electrode wire doesn’t touch workpiece, there is no physical cutting force, it is good to process workpiece with low rigidity.
5. As the cutting path is very small, there is very less removal ratio of material, so use ratio of material is pretty high.
6. Comparing to EDM spark erosion machine, electrode wire replaced formed electrode, saving a lot of cost of designing and making electrode and prepared period is shortened obviously.
7. Using water-based working solution, clean and safe, especially environment-friendly.
8. Utilize electricity to do machining, electrical parameters are controllable, it is convenient to realize whole process automatic.

Disadvantage of wire cut EDM machining:

As the electrode needs to go through workpiece, so it can’t machine blame hole kind or step plane kind workpiece, besides, machining efficiency of wire cut EDM machine is compare to other conventional metal processing equipments.

Main difference between wire cut EDM and EDM sinker machine:

Wire cut EDM uses electrode wire to do axial feeding;

EDM sinker machine uses machined electrode with same shape as of cavity need to make.