modern machine tools are computer numerically controlled CNC . CNC machines, following a computer program, control the ... and feed information into a set of instructions for the CNC machine tool. Many machinists must be able to use both ... most machinists train in CNC programming, they may write basic programs themselves and ... adjust offsets, and perform other tasks on several CNC machines that operate hours a day. In the off-hours, during ... equipment, training in the operation and programming of CNC machine tools has become essential. Apprenticeship classes ... advance in several ways. Experienced machinists may become CNC programmers, tool and die makers, or mold makers, or be ... expanded use of and improvements in technologies such as CNC machine tools, autoloaders, high-speed machining, and