What is CNC? The abbreviation of CNC typically stands for the newer Computerized Numerical Control technology that is a spin off of its older relative NC. The major difference between NC and CNC would be the modern CNC system has a micro processor. Machining Process When you decide you need to create a part though machining you will typically follow a process similar to the one outlined below. 1. 2. 3. 4. 5. 6. Obtain a drawing Select machining method Decide setup method Select cutting tools Determine speeds and feeds Machine part By using a CNC process you are able to see many benefits. Some of them may included accuracy and repeatability, lead time reduction, and general productivity increase. You can use such programming on ● Mills and machining centers ● Lathes and Turning Centers ● Drilling Machines ● Boring mills and Profilers ● Punch presses and Shears ● Routers ● Water Jet ● Laser Profilers ● Welding Machines ● Benders ● Flame Cutting machines We will focus on CNC Machining Centers and milling for the first part of this course. Milling centers have a typical system set up of three coordinates (X,Y,Z). The part is mounted and the cutting tools will rotate around. As a machinist and programmer you are responsible for many of the aspects of the operation and quality of production. The machine operator will typically handle the setup and quality control of the parts but the CNC programer may include some of the operator’s duties as well.
