Unit 1 What Is CNC数控概念l Lesson 1 How CNC Works and Motion Control CNC的工作原理和运动控制1 1 How CNC Works CNC的工作原理 1 2 Motion Control 运动控制 1 Lesson 2 Programmable Accessories and the CNC Program 可编程附件和CNC程序3 1 Programmable Accessories 可编程附件3 2 The CNC Program CNC程序3 Lesson 3 The CNC Control and What Is a CAM System CNC控制器和CAM系统4 1 The CNC Control CNC控制器（数控系统)4 2 What Is a CAM System CAM系统5 Lesson 4 What Is a DNC System DNC系统6 Unit 2 Numerical Control Machine 数控机床9 Lesson 1 Creation and Development of NC Machine 数控机床的产生和发展9 1 NC Stage (1952-1970) 数控（NC)阶段（1952—1970年)9 2 CNC Stage (1970-) 计算机数控（CNC)阶段（1970年一现在)10 Lesson 2 The Types of NC Machine 数控机床的类型11 Lesson 3 Components of NC Machine 数控机床的组成13 Lesson 4 Principle of Working for NC Machine 数控机床的工作原理15 ……
