As opposed to using a wire electrode, CNC EDMs use graphite or copper electrodes. The electrode is machined over a CNC mill to produce a negative of the specified cutting pattern. A horizontal machining center is really a CNC lathe that uses an enclosure and automated turrets to alter tools. https://usedindustrialmachines33210.theblogfairy.com/31663203/cnc-machine-exporters-things-to-know-before-you-buy