MITSUBISHI FA20S Wire EDM Machine

The Mitsubishi FA20S is a high-precision CNC Wire Electrical Discharge Machining (Wire EDM) machine manufactured by Mitsubishi Electric. It's part of the FA series, designed for cutting complex shapes in hard metals using a thin wire electrode that erodes material through electrical sparks in a dielectric fluid. This model is popular in tool and die making, aerospace, and precision engineering for its accuracy, speed, and reliability. Introduced around the mid-2000s, it's an evolution of the earlier FA20, with enhancements like improved threading systems and controls.

Key Specifications

Metric (mm)
Imperial (inches)
X-Axis Travel50019.7
Y-Axis Travel35013.8
Z-Axis Travel295–30011.6–11.8
U/V-Axis Travel±75–76±3.0
Table Size780 × 63030.7 × 24.8
Max Workpiece Size1050 × 800 × 29541.3 × 31.5 × 11.6
Max Workpiece Weight1500 kg3300 lbs
Wire Diameter Range0.1–0.3 mm0.004–0.012 in
Wire Spool Capacity10 kg22 lbs
Machine Weight~2450 kg~5400 lbs
Machine Dimensions (L×W×H)2013 × 2632 × 210079 × 104 × 83Power Supply220V, 3-phase-

Control System: Mitsubishi 64-bit CNC (e.g., W21FAS-2 or W31FSA-2) with color CRT touchscreen for programming and 3D simulation.
Features: Automatic wire threading (AT or AF3), submerged cutting capability, high-speed power supply (AE3-HS), dielectric chiller for temperature stability (±1°C), and isolation transformer. Supports fine machining for surface finishes under 0.5 µm Ra.

Common Applications

Precision tooling for molds, dies, and gears.
Aerospace components (e.g., turbine blades).
Automotive parts like flywheels for motorsports.
Medical devices requiring tight tolerances.