CNC stands for Computer Numerical Control.
CNC Machining is a process used in the manufacturing sector that involves the use of computers to control machine tools. Tools that can be controlled in this manner include lathes, mills, routers and grinders.
With CNC machining, three-dimensional cutting tasks can be accomplished in a single set of prompts. Pre-programmed computer software dictates the movement of factory tools and machinery.
First a CAD drawing is created (either 2D or 3D), and then a code is created that the CNC machine will understand. The program is loaded and finally an operator runs a test of the program to ensure there are no problems. This trial run is referred to as “cutting air” and it is an important step because any mistake with speed and tool position could result in a scraped part or a damaged machine.
Benefits of CNC Machining:
There are many advantages to using CNC Machining. The process is more precise than manual machining, and can be repeated in exactly the same manner over and over again. Because of the precision possible with CNC Machining, this process can produce complex shapes that would be almost impossible to achieve with manual machining. CNC Machining is used in the production of many complex three-dimensional shapes. It is because of these qualities that CNC Machining is used in jobs that need a high level of precision or very repetitive tasks.
Cons of CNC Machining:
CNC Machining can be very expensive. Although they don’t cost very much to run, they are very expensive to purchase. In addition, maintenance for CNC Machines can be very costly as well.
Where to find these machines on campus?
The maker-space has these machines available. In order to get the most out of them, there are classes that you can sign up for that teach you how to program them and use them safely.
Sources:
https://www.americanmachinist.com/shop-operations/5-reasons-5-axis-cnc-machine-actually-good-your-shop
https://www.quora.com/What-is-CNC-machine
What Is CNC Machining? An Overview of the CNC Machining Process