As with any subject, the more time you invest in learning about CNC and the related technologies, the more you will get from it. The following are some key areas that are important to become familiar with.

Computer skills

One requirement common to all aspects of CNC work is how to use a computer to perform basic tasks. You may need to use a combination of software to design and cut your parts. This will require an understanding of starting and stopping software programs, saving, copying, moving and deleting files, finding files stored on your computer and installing programs and updates. If you don’t feel comfortable with your current computer skills or are new to running a PC then it would be well worth taking a basic course or buying a general guide to working with your PC.


Design & Toolpath Software

Before you can cut anything with a CNC, you need to first create the design layout that the machine is going to follow to cut the parts. The software you choose will play a significant role in successfully creating projects.

Simply put, the design and machining (toolpath) software will allow you to transform “pencil and paper” ideas to a set of instructions used to run the machine. When done correctly, the end result will be a physical product that has value and purpose and a great sense of achievement.


Operating and Maintaining your CNC Machine

If you currently own or use a CNC machine, you already know how important it is to be aware of its limitations to work within them. You will also understand that you need to keep it properly maintained and know how to set it up correctly to run a job.

If you don’t own a machine yet, then it’s important to spend time thinking about what you want your machine to be able to produce, this can help eliminate a lot of potential future frustration. Cost will always be an important factor, but that also needs to be balanced against its capabilities, because nothing can be more expensive than a machine that cannot do what you need. For example, if you want to cut large sheet goods then a smaller model will not be the best choice. However, if you have limited space then this may be your only option and you need to understand its limitations on how large a part it can cut. Only you can determine what this balance will be for your situation and budget.

Some important considerations when researching the purchase of a machine or when looking at building one yourself include size, speed and accuracy and the technical support offered both before and after the purchase. As with software, the importance of a company’s reputation, support, and an active website and/or forum cannot be understated.

Every CNC machine needs software to directly drive its movement; this is commonly referred to as the ‘Control Software’. This takes the instructions created in the Design and Machining program and turns it into physical movement with the machines motors. Some common generic third-party packages that do this include “Mach3” and “WINCNC”. Many manufacturers create and use their own proprietary systems as well. The control software may be installed on an external PC or be loaded onto a dedicated Control Box which is part of the machine.


Knowledge of Materials and Tooling

When it comes to obtaining the best possible results, another essential set of factors are the material you are working with and the tool you are using to cut it. Material choice will effect every stage of the Project – from initial concept through final finishing.

The most common materials people using CNC Routers work with include; wood, plastics, dense foam board and softer (non-ferrous) metals (brass, aluminum, etc.). If you are not already familiar with the type of material you want to use, there are many sources of information that can help you.

To efficiently and safely cut different types of material you will need to choose an appropriate tool (bit), know how fast you can move that tool through that material (Feed Rate and Plunge Rate), how much material you can remove at one time (Pass Depth and Cut Depth) and how fast the bit should be rotating (Spindle or Router speed). Typically suppliers of tooling offer technical information on the correct settings for cutting different material types with the router bits they sell.

On the internet you will find many good sources of information from material and tooling manufacturers websites. Another excellent resource is ask questions and read about other users experiences with different tools, materials and settings on User Forum's such as Vectric’s, which you can access here - http://www.vectric.com/forum

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