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Today, FA products continue to be used to create automated systems in over 100 countries around the world. It is common for the FA group to deliver controls and servomotors to machine tool builders who integrate them into a conventional CNC machine. A significant proportion of the world's CNC machines are powered by FANUC controls.
The operating system of such machines is a closed loop system and functions on feedback. These machines have developed from the basic NC (NUMERIC CONTROL) machines. A computerized form of NC machines is known as CNC machines. A set of instructions (called a program) is used to guide the machine for desired operations.
In the 1970s, Thermwood developed CNC machine tool control and used it to create machinery that would trim its plastic parts. It began selling this trim equipment for various applications and the CNC router was created. Thermwood is now known as one of the oldest CNC router companies.
CNC routers can perform the tasks of many carpentry shop machines such as the panel saw, the spindle moulder, and the boring machine. They can also cut joinery such as mortises and tenons. A CNC router is very similar in concept to a CNC milling machine. Instead of routing by hand, tool paths are controlled via computer numerical control.
CAM software automates the process of converting 3D models into tool paths, the route the multiaxis machine takes to mill a part (Fig. 1). This software takes into account the different parameters of the tool head (in the case of a CNC router, this would be the bit size), dimensions of the blank, and any constraints the machine may have.
Soon after World War II, the numerical control (NC) machine was developed. NC machines used a series of numbers punched on paper tape or punched cards to control their motion. In the 1960s, computers were added to give even more flexibility to the process. Such machines became known as computerized numerical control (CNC) machines. NC and CNC ...
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