Sinker EDM Accommodates Large Workpieces

Makino’s EDNC21 sinker EDM provides dual heads to improve productivity and lower the tool build time for large molds. The HS-Rib Z-axis configuration reduces rough machining speeds of small electrodes such as plastic injection tooling ribs or pin gate details, and provides enhanced jump speeds as fast as 20 m/min to reduce machining times.

The EDM offers a work envelope measuring 122.0" × 70.9" × 39.4" (3,100 × 1,800 × 1,000 mm) to accommodate extra-large workpieces, such as automotive bumper and fascia molds. The machine’s X-, Y- and Z-axis travels measure 78.7" × 59.1" ×23.6" (2,000 × 1,500 × 600 mm). Each of the gantry-style heads is capable of traveling 78.7" (2,000 mm) and is independently controlled and programmed using a dedicated Hyper-i control system. The EDNC21 provides a total workpiece payload of 22,047 lbs (10,000 kg) and accommodates electrode weights ranging to 662 lbs (300 kg) per head.

The design of the EDNC21 includes a programmable rise-and-fall front door for easy operator access during setup and operation. Door height, which controls dielectric fluid level, can be set to match the height of the workpiece while providing optimum viewing of the machining operation.