The new DNM series is comprised of three machines, the DNM 4500, 5700, and 6700, stepped up in size and capacity. In general, the series offers larger cutting space by 6%, bigger table sizes by 14% and heavier loads by 25% while maintaining the same overall footprint as the previous generation. For the three models, the X-axis travel is 800 mm (31.5 in.), 1050 mm (41.3 in.), and 1300 mm (51 in.). Y-axis is 450 mm (17.7 in.), 570 mm (22.4 in.), and 670 mm (26.4 in.). Z-axis is 510 mm (20 in.), 510 mm (20 in.), and 625 mm (24.6 in.).
The new DNM series features direct-coupled, thru-coolant type spindles as standard, providing 8,000 rpm (15/11 kW) and 12,000 rpm (18.5/11 kW). Vibration and noise are greatly reduced during high-speed operations and thermal displacement is also improved. The direct drive spindles also contribute to faster accel/decel rates and tool change times have also been optimized to reduce non-cutting time. Tool storage ranges from 30 up to 60 stations. Additionally, the thru-the-spindle coolant design keeps the coolant exactly where it needs to be – at the tool tip – and machine operators do not have to keep adjusting and monitoring coolant nozzles.
Other specifications include a Big Plus 40 tool taper interface and table sizes of 1000 x 450 mm (39.4 x 17.7 in.), 1300 x 570 mm (51.2 x 21.3 in.), and 1500 x 670 mm (59.1 x 26.4 in.). Maximum table loads are 600 kg (1322.8 lbs.), 1000 kg (2204.6 lbs.), and 1300 kg (2866 lbs.).
One of the key highlights of the control system is the standard “Easy Operation Package” (EOP), developed by Doosan that provides numerous functions designed for expedient operation via pop-up windows and “hot keys”. For example, adaptive federate control, tool management, tool load monitoring, table setup, and tool changer recovery are among the several convenient choices.