GF Machining Solutions AgieCharmilles FORM E 350

The FORM E (Essential) series is GF's value-tier sinker EDM line, while the FORM P (Performance) series is the higher-capability tier. The main differences are: the FORM E 350 has a smaller work envelope (350 x 250 mm vs 600 x 400 mm), a simpler iQ GENERATOR power supply instead of the IPG, and lacks the Intelligent Thermal Management (ITM) system for active dimensional compensation. The FORM E 350 is well-suited to general mold and die work; the FORM P 600 is for demanding applications requiring the finest finishes, highest accuracy, and thermal stability over long cycles.

The FORM E 350 works with both graphite and copper electrodes, with the AC FORM technology database covering both. Graphite is the most common choice in North American shops — it machines quickly on CNC mills, is lightweight (important at 50 kg electrode weight limit), and provides good roughing efficiency. Copper is preferred for very fine finishes and for specific mold steels where graphite can leave surface residue. The iQ GENERATOR is optimized for both material types through the technology database.

The FORM E 350 can achieve surface finishes in the Ra 0.4 µm range (VDI 18) in production use. Mirror finishes (Ra 0.1 µm, VDI 3) are achievable with optimal conditions, fresh oil, and careful parameter management, but this is more reliably and consistently achieved on the FORM P and FORM X series with their IPG power supply. For most mold applications — where hand polishing follows EDM — the FORM E 350's finish capability is entirely adequate.

New FORM E 350 machines price between $90,000 and $150,000 depending on options. Base machines with oil dielectric system, AC FORM control, and iQ GENERATOR are toward the lower end. Adding C-axis rotation, AEC compatibility, upgraded flushing, and fire suppression pushes toward $150,000. Used FORM E or earlier-generation AgieCharmilles FORM machines with similar work envelopes can be found in the $30,000-$70,000 range depending on age and condition.

The FORM E 350 is one of the more accessible sinker EDMs for facility integration. At 2,800 kg, it does not require a reinforced or isolated concrete foundation in most standard industrial facilities. Electrical requirements are typically three-phase power at standard industrial voltages (208-480V depending on region and configuration). The dielectric oil system does require appropriate containment, fire suppression (mandatory for oil-dielectric EDMs operating unattended), and ventilation. Your GF Machining Solutions dealer can provide the specific installation guide for your region.