What is a CNC machine?

What does CNC stand for in machining?

CNC stands for Computer Numerical Control, which refers to a machining process of using computer software to instruct equipment to manufacture parts and products. Some tasks that these automated large tools can complete include cutting, drilling, milling and turning.

How do CNC machines work?

A CNC machine operates by translating a digital design into a set of instructions that control the movement of its tool components. The digital design is usually a Computer-Aided Design (CAD) file created by a specialist engineer.

CNC machinery processes rely on the following features:

1. Controller – The brain of a system, which interprets instructions and sends commands to other components
2. Drive system – The motors and actuators that move the machine tools
3. Machine tools – The physical parts used to perform the tasks, such as drills and cutters
4. Feedback systems – The sensors that monitor performance and ensure accuracy

What are the benefits of CNC machining?

There are numerous benefits for your business when you add a CNC machine to your collection, including:

• Enhanced precision and accuracy due to minimal human error
• High efficiency with automation cutting down setup and production times
• Reduced waste thanks to optimised performance that leads to greater material utilisation
• Repeatable, consistent operations make them ideal for mass part production
• Quick reprogramming allows you the flexibility to carry out changes with little downtime

Common CNC machine types

CNC milling machine

Milling machines remove material from a workpiece to create complex shapes, slots, holes and contours.

CNC lathe

Lathes spin and cut workpieces to shape them, making this type particularly useful for producing symmetrical objects like rings and cylindrical parts.

CNC plasma cutter

Plasma cutters use a hot, ionised gas jet to cut through compounds like metal. These tools are known for their speed and ability to slice through thick sheets with minimal waste.

CNC router

Routers act in a similar way to milling machines, but are predominantly used on softer materials, such as wood, plastic and foam. Common projects may include manufacturing furniture and signage.

CNC multi-tasking turning center

Multi-tasking turning centers combine milling and rotating operations into a single set-up, improving efficiency and space utilisation.

CNC waterjet cutter

Waterjet cutters use high-pressure water streams to cut materials without generating heat, which helps when cutting heat-sensitive items like glass or rubber. Abrasives are sometimes added to the water to improve effectiveness.

CNC drilling machine

Drilling machines are used to create precise holes in a range of resources. They are essential in industries where specific depths and widths must meet regulatory requirements.

CNC grinder

Grinders have rotating wheels that remove materials and ensure ultra-smooth finishes on edges.

Which manufacturers make CNC machinery?

• Hyundai
• Hwacheon
• Doosan
• DMG Mori
• Haas Automation
• Mazak
• Okuma

Why should I consider buying a CNC machine at auction?

Buying CNC machinery at auction can be a wise decision due to the many advantages it can bring to your business. Here are some examples:

1. You might save money, with many pre-owned tools available at lower prices
2. You could receive your item fast, as auctions tend to offer ready-to-ship equipment
3. You may find a large selection of options at various price points
4. You can usually rely on RICS-accredited valuers to verify machine condition and maintenance history for peace of mind

Browse CNC machinery available at auction

CNC machinery is one of our specialist areas, with Eddisons Asset Auctions having dedicated experts who are here to facilitate a smooth transaction. We have 180 years of professional experience and are highly rated by past clients, which we hope gives you the confidence to utilise our services.

If you are interested, please browse our CNC machines or use the form below to get in touch with us.