Makino EDNC-20

The Makino EDNC-20 is the largest EDNC sinker EDM, with a 2,500 x 1,200 mm (98.4 in x 47.2 in) table, a 10,000 kg (22,046 lb) workpiece rating and a 2,800 x 1,600 x 1,050 mm (110.2 in x 63.0 in x 41.3 in) work tank. The 1,050 mm (41.3 in) depth is what lets tall die blocks sit fully submerged.

Each travel row carries two figures. X is 2,000 mm (78.7 in) with 2,200 mm (86.6 in) in brackets, Y is 700 mm (27.6 in) with 1,000 mm (39.4 in), and Z is 600 mm (23.6 in) with 800 mm (31.5 in). Makino refers to more than one EDNC-20 configuration but the table does not say which gets the larger strokes, so name the configuration on the quotation. The bracketed 800 mm Z matches the stroke Makino gives for the HS-Rib high-speed Z-axis.

Access is through a programmable rise-and-fall front door on every configuration, with a stationary worktable, so parts are loaded from the front rather than over a dropped tank wall. The dielectric reservoir is integrated into the base casting.

Rapid traverse is 2 m/min (79 in/min), slow next to the 5,000 mm/min (197 ipm) of the EDNC-17. When the machine is equipped with HS-Rib, jump motions reach up to 20 m/min over the 31.5” (800mm) stroke, and Makino quotes up to a 60 percent reduction in cycle time against traditional processes; the core-cooled ball screw holds depth control over continuous hours.

ATC options sit outside the work tank, with 8, 16 or 32 tools listed. Electrodes can weigh up to 100 kg (220 lb) and the generator row reads 60A ~ 240A. The Hyper-i control uses a 24” class touch screen with digital manuals and E-Tech Doctor, and runs HyperCut and SuperSpark IV.