The RAuK series, manufactured by Zolix, are ultra-high precision motorized rotation stages. It has been engineered based on the RAK series which can import grating internal, achieve 360° closed-loop. It also has a closed-loop resolution is 1.8〞(RAuK100)or 1.2〞(RAuK200). It has a drive ratio of 180:1, a maximum speed of 25 deg/sec and a repeatability of less than 0.005.