High speed, and high precision are the most important criteria in evaluating the performances of machine tools. However, high speed of moving platform could excite the vibration of the feed drive system. The dynamic model is developed in this paper and three fundamental vibration modes are observed in the system. To reduce the vibration, two command shaping algorithms zero velocity (ZV) and modified input shaping (MIS) are applied in the interpolation of the CNC controller. The dynamic behaviours of the feed drive system are analyzed. It is shown that the conventional ZV method could excite higher frequency modes. However, the MIS method could not only have notch filter effect but also have low pass filter effect such that it could avoid exciting higher frequency modes.