The transmission system is also called the transmission chain. He has first and second end pieces. The first end piece is also called the active piece, and the end piece is also called the follower piece. Each transmission system is composed of a certain transmission law from the head end part to the end part. This is the transmission ratio, so as to guarantee the performance of the machine tool. General machine tool transmission system can be divided into main movement transmission system, feed movement transmission system and fast air-stroke transmission system according to the nature of the movements it undertakes. The general understanding of the transmission system diagram can be.