The NH5000 DCG is one of the NH Series' leading machines. It uses “Driven at the Center of Gravity” technology and boasts the highest speed in its class. Customers can choose from 40 and 50 taper spindles. The 40 taper spindle offers both a space-saving design and a large work envelope, while the 50 taper spindle offers the strongest cutting ability. The machine's Direct Drive Motor (DDM®) technology provides outstanding transmission efficiency and a high-speed feed with zero backlash.
Moving parts are guided and driven with perfect balance at their center of gravity by the “Box-in-Box” Construction, which supports the saddle at both ends. At the same time, they have improved the servo motor’s traceability, allowing higher speed and greater acceleration than ever before.
DCG “Driven at the Center of Gravity” technology controls vibration, which is one of the main enemies of high speed and high precision, by driving structural parts at their center of gravity. For positioning, machines with DCG virtually eliminate vibration, while machines without DCG continue to vibrate for a long time. DCG controls the rotational vibration which appears at every acceleration start point, and which is proportional to the distance between the drive point and the center of gravity. This prevents deterioration of the quality of the machined surface.
For the spindle drive, they use the high-efficiency DDS (Direct Drive Spindle) motor which extracts full power over a wide range, from high-speed machining to heavy-duty cutting. This machine handles all types of materials from steel to aluminum and other non-ferrous metals. Boring up to 500 mm (19.6 in.) can be done without turning the B-axis, reducing cutting time and achieving high precision machining.
Until now, gears have been used to transmit the drive power to the rotary axes, but this drive system had a negative effect on drive speed and precision. By transmitting the drive power to the rotary axes directly without using gears, DDM offers outstanding transmission efficiency and high-speed feed. DDM also achieves zero backlash.