What is CNC Machining?

Computerised Numerical Control, or CNC, came shortly after WW2, as a result of the aircraft industry’s desire to produce more accurate and complex parts.

CNCMachining is a process used in manufacturing that involves the use of computers to control machine tools. Tools that can be controlled in this manner include lathes, mills, routers and grinders.

On the surface, it may look like a normal PC controls the machines, but the computer's unique software and control console are what really sets the system apart for use in CNC machining.

Under CNC Machining, machine tools function through numerical control. A computer program is customised for an object and the machines are programmed with CNC machining language, for example G-codes, that essentially controls all features like feed rate, coordination, location and speeds. With CNC machining, the computer can control exact positioning and velocity.

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.

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.

Timsons Engineering’s versatile, multi million pound machine shop can manufacture close tolerance components from 1 kg to 2.5 tonnes using CNC machine tools, such as, Lathes, Vertical Mills, 5 Axis Horizontal Mill, Grinding, Gear Cutting, Wire Eroding to name but a few.

We hold accreditation to ISO 9001:2008, for both our Machine Shop and Foundry. We offer 100% inspection of all components and full inspection reports are provided.

To see CNC machining in action check out our video on the website and on youtube