Second. Introduction to the principle of the main work: a) Drag part: Movable saw cars are supported on the bed by linear guide, by servo motors through reduction machine and toothed belt drive train, saw head, fixture, roller, etc. The guide roller is also arranged in front of the saw head, and the horizontal roller and the side guide roller are arranged, respectively, and the horizontal roller can be adjusted up and down, and the side guide roller can be adjusted to be adapted.