The machine base of JK50M-HD is made of castings with good rigidity and stability. Precision linear rectangle guides are used. It is pre-tightened and with good rigidity and accuracy. The ball screws are grounded with the accuracy of high degree accuracy and pre-tightened. The interface is of international standard G codes and compatible with domestic or foreign engraving software. It is easy to use. Automatic tool-changing means to fulfill milling , drilling and engraving orders automatically on one surface thus to rise up processing efficiency.