Abstract
This paper describes the new 5-axis vertical machining center "D500". Conventional 5-axis machines have two major difficulties. One is that it is not easy to realize both high accuracy and high speed at the same time. And another is that it is not easy to make the fullest use of the 5-axis machines. In order to solve these, "D500" is equipped with a unique machine structure and three DD motors in the two rotating axes.
