Doosan has introduced the DNM 200/5AX, a five axis VMC that it says is affordable, reliable and compact for small shop floor spaces.
It features a built-in fourth and fifth axis trunnion table for machining of multiple faces on complex prismatic workpieces, without having to re-fixture. The machine design provides for more available Z axis clearance than a traditional VMC with a rotary system placed on the standard table. Precision and repeatability are superior as well, due to the reduction in stacked tolerances. The platter size is 7.87 in. (200 mm) in diameter, allowing for a maximum work piece of 11.81 in. (300 mm) in diameter and 7.87 in. (200 mm) in height. The maximum table load is 88 lb (40 kg).
All linear guideways feature roller type bearings, delivering three times more rigidity and double the lifespan, claims the company. Additional benefits include optimal weight and force distribution, superior stiffness, accuracy, and surface finish.
The direct-coupled spindle drive system is a true cartridge type unit supported by high precision ceramic ball bearings that offer minimal noise, vibration and thermal growth due to the absence of gears or belts inside the spindle head body. The 12,000 rpm, 15 / 25 hp motor has 86 ft-lb of torque with a spindle accel\decel time of 0 – 12 k (2.16 sec )\ 12k – 0 (2.21 sec).
The bed is a rigid, one piece casting made from fine grain Meehanite cast iron with heavy ribbing to help prevent vibration and deformation during heavy cutting. Extra wide spacing of the roller guideways provide for excellent support of the saddle, regardless of the load distribution on the table. The table is fully supported by the saddle in all positions with no overhang. The rigid box type column casting is heavily ribbed to help prevent twisting or distortion as well as helping to dampen vibration during high speed or heavy machining.