6 Key Considerations When Choosing a Wire EDM Machine
Release date:
2022-04-22
The term “middle‑wire EDM” is not scientifically sound; it is merely a generic label for reciprocating wire‑cutting machines and multi‑pass cutting machines. Visually, it differs from both fast‑feed wire EDMs and slow‑rise wire EDMs. Strictly speaking, only a machine with single‑pass multiple‑cut capability and no intelligent control can be called a “middle‑wire EDM.” Moreover, the absence of a scientifically defined “middle‑wire EDM” has led to confusion and trouble for users when selecting such equipment, with many customers deeming it deceptive.
Why is it called “wire EDM”?
“Medium‑wire EDM” is not a scientifically sound term; it is merely a collective designation for reciprocating wire‑cutting machines and multi‑cutting‑process machines. Visually, it differs from both fast‑feed wire EDMs and slow‑rise wire EDMs. Strictly speaking, only a machine with a single‑pass multiple‑cut capability and no intelligent control can be called “medium‑wire.” Moreover, the lack of a scientifically defined “medium‑wire” standard has led to confusion and even deception in the market—particularly when counterfeit or substandard machines are marketed as “medium‑wire” equipment, causing significant headaches for users during equipment selection.
How do you distinguish between different levels?
All manufacturers of wire EDM machines engage in extensive marketing for their products. As users—especially those who are not well‑versed in wire EDM—it can be difficult to distinguish between genuine and counterfeit offerings, since wire EDM itself is a relatively new concept. Consequently, most users tend to adopt a “hindsight is 20/20” attitude.
The primary issue in studying the differences among mid‑range wire EDM machines lies in distinguishing them based on students’ understanding of machine design and control‑system technology, rather than on the machine’s external appearance. At present, most mid‑range wire EDM machines available in the Chinese market can at best be classified as first‑generation models. These machines are essentially evolved from fast‑wire EDMs, with the addition of a multi‑pass cutting capability; however, they also incorporate a wire‑guide that is extremely inconvenient to install. In other respects—whether in terms of machine structure or in intelligent control and management—they have made little progress. The electrode wire is treated merely as a tool for controlling wire speed, while tension and vibration remain poorly managed. Even when internal controls are employed, they are purely mechanical: the electrical parameters for each cut must be manually set by the operator, requiring prior data entry, and different workpiece materials necessitate separate manual input of environmental parameters.
Consequently, first-generation wire-cut EDM machines place very high demands on operators. Operators must not only master the myriad combinations of high-frequency parameters for different materials, thicknesses, and cutting times, but also continuously monitor the electrode wire’s performance—tasks that require exceptional technical expertise. This is precisely why most users experience a shift from hope to disappointment when using wire-cut EDM machines.
Building on the first-generation wire feeder, the second-generation model achieves intelligent control of high-frequency parameters and feed‑rate tracking, eliminating the need for operators to manually select and configure these settings. By simply entering the “material,” “thickness,” “Ra value,” and “electrode wire diameter,” the smart machining control system can retrieve the optimal parameter set from its expert database, further enhancing the system’s level of intelligence. However, significant variations exist among manufacturers, with some even providing misleading information to deceive customers.
As the most powerful intelligent system on the market today, it boasts the following six intelligent features:
① Intelligent electrode wire speed;
② Determine an intelligent processing offset;
③ Processing time;
④ Intelligent matching of high-frequency parameters;
⑤ Intelligent power feed tracking;
⑥ Intelligent short-circuit detection.
This enables even beginners to quickly master the operation of wire EDM machines.
As such, customers must develop a thorough and meticulous understanding of wire‑drawing machines by exploring various options and actively listening to and observing different perspectives.
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