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The AC Cut human-machine interface (HMI) from GF Machining Solutions provides a common language for the company’s Cut line of wire EDM machines. The programming interface shares the same basic platform and functional layout as the company’s AC Form HMI for sinker EDMs, enabling easier transitions for users moving between the two types of machines. According to the company, the interface increases efficiency and process reliability.

Based on Windows, the HMI offers interactive graphical assistance so that all functions, such as measurement and machining cycles, are illustrated by icons for faster operator understanding. A “sequence” screen automatically organizes machining flow. Programming steps are ordered chronologically. An onboard CAM system enables fast programming at the machine from common file formats including IGES and DXF. Backward capability enables users to run older part programs generated for existing GF Machining Solutions EDMs on newer and future models with a converter included in the HMI. The HMI features E-Connect for MTConnect compatibility and electronic documentation in an embedded HTML format.

The interface includes several automatic wire EDM machining strategy functions. A reverse-cut function automatically reverses direction at the end of a burn path and cuts back along the same path just traveled. According to GF Machining Solutions, this capability is well-suited for machining punches, as the machine is able to rough-cut clockwise around the punch shape, then counterclockwise for the finish pass for shorter cycle times. Skimming in the open and skimming in the gap functions ensure absolute parallelism and straightness from a workpiece’s top to its bottom, by automatically adjusting gap voltage for optimized skimming. GF Machining Solutions EDM Expert recommends specific types of wire for the optimum performance and surface finish based on workpiece materials and desired machining parameters, the company says.