Multi-wire electric discharge machine

A multi-wire electric discharge machine comprising:

• a plurality of cutting wire sections arranged in parallel in such a way as to face a workpiece, a wire electrode being wound around a plurality of guide rollers to form the cutting wire sections;
• a driver to adjust relative distances between the workpiece and the cutting wire sections;
• a machining power supply to apply pulse voltages between the workpiece and the cutting wire sections;
• a machining-state detector to detect machining states in the cutting wire sections;
• a machining controller to control the driver and the machining power supply;
• a first data acquisition circuitry to acquire learning data including the machining states, facing widths of the cutting wire sections and the workpiece, and control parameter change information on a control parameter changed by the machining controller in the machining states and the facing widths;
• and
• a model generation circuitry to generate a learned model by using the learning data, the learned model being for inferring the control parameter change information from the machining states and the facing widths, wherein
• when values indicating the machining states exceed a threshold value, the machining controller outputs, to the machining power supply, commands to apply the pulse voltages according to a machining condition for avoiding breakage of the wire electrode.