There are many types of CNC machines; however, we will be focusing on the CNC router in this class. Other types of CNC machines include:
Computers are used to automate processes that would otherwise be done manually. Think about drilling precise holes with a drill press. You must measure, mark, and drill. For production runs the use of a jig is recommended for repeatability. These steps are eliminated by the use of CAD and CAM software and the use of a CNC machine. The result is greater precision in a fraction of the time.
CAD (Computer Aided Design/Drafting) software allows users to draw accurate shapes in known locations. CAD software utilizes vector-based graphics. Vector graphics are based on vectors, which lead through locations called control points or nodes. Each of these points has a definite position on the x- and y-axes of the work plane and determines the direction of the path. Think about the geometric coordinates (x,y). There are 3 basic types you need to know: