The five-axis functionality of the D800Z helps to minimize set-up time because it provides greater access for milling complex features and dimensions. Also, Makino’s proprietary SGI.4 software supports high-feedrate, tight-tolerance machining of contoured shape, and promotes higher production rates than standard CNC systems while maintaining high accuracy.
Makino introduced a five-axis vertical machining center as a new entry for its D-Series designs for high-performance job shops, precision part machining, and applications in die/mold and aerospace parts manufacturing. Like the D-Series’ D300 and D500 machines, the new D800Z offers easy access to the spindle and table; a rigid structure for responsive cutting and quality surface finishes; and optional automation devices. Workpieces of up to 1,000 mm in diameter and weighing up to 1,200 kg can be machined in five axes, with great efficiency and fewer operations for reduced production time.
“Large-part, five-axis machining presents numerous challenges, due to the size, weight and range of features found on large components,” said Bill Howard, Makino’s VMC product line manager. “The D800Z five-axis machine provides new levels of sustained dynamic accuracy, achieved through technologies that are very productive, yet minimize thermal influences and maximize volumetric accuracy.”
The five-axis capability of the D800Z can be used to minimize set-up time in five-face milling mode, because it offers wider access to complex, multisided parts, thereby reducing cycle times. It also addresses other demanding requirements of die-and-mold machining, like angular features, blending, matching, executing fine-surface finishes and achieving 3D accuracy.
The integral, direct-drive motor design of the D800Z’s fourth and fifth axes and rigid supporting machine structure mean it is able to maintain productive speed and execute smooth motion, further ensuring process accuracy — even with large workpieces and payloads up to 1,200kg.
The machine’s core-cooled ball screws, temperature control of the direct-drive motors, and massive machine structure offer thermal stability that guarantees sustained accuracy over time.
The novel “Z” shape of the tilt-trunnion table ensures that the center of gravity for the table and work are always captured within the center of rotation of the B- and C-axes. Large-diameter bearings minimize table deflection and provide stiffness and rigidity, regardless of the angular and rotary position of the work. The direct-drive motor design provides the speed for productivity and precision for tight-tolerance work.