Computer numerical controlled


CNC[2] refers to the automation of machine tools that are operated by a computer. In modern CNC systems, CAD/CAM drawings are output to programs that can generate a computer file that creates the commands needed to operate a particular machine. These commands are then loaded into the CNC machines for production. Since any particular component[1] might require the use of a number of different tools, such as drills, saws, modern machines often combine multiple tools into a single “cell[3]”. In other cases, a number of different machines are used with an external controller and human or robotic operators that move the component from machine to machine. In either case[4] the complex[5] series of steps needed to produce any part is highly automated and produces a part that closely matches the original CAD design[6].

Terms definitions
1. component. The three strands of Technology in the NZC (Technological Practice, Technological Knowledge, and Nature of Technology) – together with the six specialist knowledge and skills strands for levels 6, 7, and 8) – support the development of students’ technological literacy. Each of these strands is broken down into smaller groupings (or substrands) called “components”. For […]
2. CNC. Computer Numerical Controlled refers to the automation of machine tools that are operated by a computer. In modern CNC systems, CAD/CAM drawings are output to programs that can generate a computer file that creates the commands needed to operate a particular machine. These commands are then loaded into the CNC machines for production. Since any […]
3. cell. A single square that can contain data in a spreadsheet. It is referred to by its cell reference which is made up of its row and column index. e.g. B4 will be the cell where the second column (B) and the forth row (4) meet. Hence B4 Related Articles: Glossary: CNC« Back to Glossary Index
4. case. A control mechanism in which the value of a variable or expression changes the execution of a program and which usually involves multiple branches. Related Articles: Glossary: CNC« Back to Glossary Index
5. complex. In senior Technology programmes, the term “complex” is used to identify curriculum level 8 (NCEA Level 3) specialist knowledge and skills. Further explanation can be found in the explanatory notes of the subject specific standards. The progression is from “basic” (curriculum level 6) to “advanced” (curriculum level 7) through to “complex” (curriculum level 8). Related […]