High-Rigidity Mechanical Structure
The bilateral gate structure in SIRIUS-1750 is the ideal design for distributing the vibration, the weight, and the heat throughout the entire frame. The machine is built through the finite element analysis to minimize the frame distortion which may be caused by machining condition or environment. Standard application of linear guides on all axes is superb for vibration absorption and impact dampening during hard cutting.
The spindle integrates the motor to limit vibration, noise, and power loss at high speed rotation. The jet of oil is injected directly onto the spindle bearing for effective cooling, and the motor and the spindle assembly are jacket-cooled to limit the displacement caused by heat. To achieve greater precision, the spindle constantly monitors for possible thermal displacement and makes necessary adjustment in real time.
High-precision feed drive
The feed surface is coated with fluorinated resin, and is hand-scraped to precision by Hwacheon master technicians to minimize the friction. The servo motor is coupled directly to the drive; and the ball screws are tensile preloaded, so that the heat generated from the ball screws do not cause the distortion and affect the machining precision.