Metal Cutting

EDM Equipment

EDM, or electrical discharge machining, is capable of machining complex shapes in hard materials. The process includes an electrode and a workpiece, both submerged in dielectric fluid. Electrical current flows between the workpiece and electrode, repeatedly creating tiny plasma zones that instantaneously melt and remove the material. The electrode in EDM takes different forms. Wire EDM machines use a thin wire to cut. Ram EDM machines, or “die sinkers,” use electrodes that are custom machined into 3D shapes. The EDM process produces a cavity in the part that is the opposite or female version of the “male” electrode form. Similar to the ram EDM machine is the small-hole EDM machine, or “hole popper.” On this machine, the electrode is a cylinder used to machine a hole. These  machines can simply provide starter holes for wire EDM, but can also cut holes in materials that are too difficult to drill.

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What it Takes to Do Unattended Wire EDM


The promise of running a wire EDM for long stretches without much operator attention is enticing, but many shops never manage to pull this off. Here are tips to make it happen, as offered by Mark Cicchetti, EDM technical director for Absolute Machine Tool’s Accutex EDM product line.

Hole Making as a Core Competency


This manufacturer leverages various nonconventional machining processes to create accurate holes in a range of tough materials. In fact, precision hole-making has become one of its specialties.

Scratching the Surface


Although this shop has yet to fully explore the capabilities of a new wire EDM’s unique motion system and other precision-boosting features, more incremental improvements have already spurred management to order a second, identical model.



Global EDM Excetek WGPlus 650

EDM Brand Features New Digital Power Manager

By: Katie Cattell
Global EDM offers four machines from its Excetek EDM brand, including three from the new WGPlus series.

Absolute AccuteX Great Economy

Accessible EDMs Feature Submerged Wire Threading

By: Katie Cattell
Developed to enable more manufacturers to take advantage of EDM capabilities, the AccuteX Great Economy (GE) wire EDMs don’t compromise on accuracy or speed, according to supplier Absolute Machine Tools.

GF AgieCharmilles Cut X series

Wire EDM Series Supports Precision in Complex Parts

By: Katie Cattell
Introduced in North America by GF Machining Solutions, the AgieCharmilles Cut X series of Wire EDMs is designed for precision machining of complex parts in high-volume production runs.

MC Machinery EA8PS

Sinker EDMs Offer High-Speed Jumping, Thermal Control

By: Katie Cattell
MC Machinery Systems will display a range of Mitsubishi’s wire and sinker EDM machines, including the EA8PS and EA12PS.

EDM Control Features Benefit Complex Machining

By: Jedd Cole
This month’s Modern Equipment Review Spotlight focuses on EDM machines and related equipment.


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