Wire EDM with Cylindrical Technology

The MV series line of wire EDM technology features design and engineering improvements, including: non-contact cylindrical drive technology, an improved power supply, auto-threading, and deeper submerged-wire threading capabilities.

The cylindrical drive technology offers a simple yet intelligent design concept using a linear shaft motor. Other EDMs built on a linear system are a flat-plate design, which limits the effective magnetic flux to only half of its potential. Mitsubishi’s round magnetic shaft creates a non-contact design using the full 360° of magnetic flux. This design delivers no wear, no cogging (inherent in flat plate systems), and no backlash – all for better energy-efficiency, accuracy, and speed.

Building and design of the MV series is on the latest technology in machine construction; with a one-piece T-shaped base casting, while the X- and Y-axis ways and drives are directly mounted, providing a highly rigid and thermally stable platform, driving the table and column independently. This style of direct-axis mounting removes all squareness and accuracy issues that come with a stacked table design, providing higher rigidity and smoother movement for more reliable, precise cutting.

The servo control system uses a fiber-optic drive system with four times the communication speed for improved reaction time and accuracy. The Digital Matrix Sensor and V350 type-V generator specifically shapes the pulse to minimize electrode wear and decrease wire vibration, decreasing wire consumption while maintaining quality and straightness of the cut. Tests show up to a 60% reduction in wire consumption and 40% lower operating costs.

A redesigned auto-threader concept delivers improved threading capabilities, with upper rollers that travel with the Z-axis, creating a constant distance to the upper guide. This allows for nearly 14" of annealed wire length, reducing the wire curl ratio and improving threading reliability on tall parts and submerged rethreading through the gap in case of a wire break.

The head design features a flat-plate power feeder using an exclusive lever lock system, making it easier to index during operation. Without the need to open doors to rotate the carbides or realign wire, shops can realize significant timesavings.