Excetek ED400C

Excetek describes the ED400C as "just enough size for medium mold": a CNC die sinking EDM with 400 mm (15.7 in) of X travel, 300 mm (11.8 in) of Y and 350 mm (13.8 in) of Z over a 700 x 400 mm (27.6 x 15.7 in) work table. It carries workpieces up to 1,000 kg (2,205 lb) and electrodes up to 50 kg (110 lb).

The 1,000 kg rating is the figure to notice. It is nearly double the 550 kg (1,213 lb) of the ED30C for an X stroke only one size larger, which means a steel mold half can go on the table where the smaller machine would be limited to inserts. Maximum workpiece size is printed as 850 x 580 mm (33.5 x 22.8 in), without a height.

This is the largest ED model that keeps its dielectric system inside the machine. The 450 L oil filter tank is built in and uses three paper filters. From the ED600C upward the tank is a separate unit with its own footprint and weight. Here the complete outside dimensions, with body, travel, tank and generator, are 2,344 x 2,110 x 2,410 mm (92.3 x 83.1 x 94.9 in), and the machine weighs 2,800 kg (6,173 lb).

Spark generation is by MOSFET circuit. Excetek notes that the generator separates hot components from cold circuits with a double heat flow system, and that its front and back modules carry fuse protection to make board changes simple. Orbiting comes from 18 kinds of OB modes according to the ED Series catalogue, which also lists edge finding and inner, outer and corner centre measurement. Oil cooling, a permanent magnetic pedestal and the tungsten carbide sparking circuit are options.