There are three types of software that you’ll be using with your CNC machine. The first is CAD (computer aided design). This is specialized software that allows you to design two- and three-dimensional objects for the CNC machine to cut, drill, and perform other actions on. The second is CAM (computer-aided manufacturing). CAM software takes the design you created with the CAD software and converts it into a “language” called G-Code. This G-Code is then used by the final type of software, Control. Control software is the actual application that talks to your CNC machine; it takes the G-Code from the CAM software and uses it to send the proper electrical signals (via the breakout board—see Chapter 6) to the three motors. This is a very simplified explanation of the three types of software— you'll find that in this chapter we haven't even scratched the surface when it comes to providing comprehensive details and
explanations on these three types of software. We cannot predict all the uses you might have for your CNC machine; your imagination and skills with the CAD software are really the only limit to what you can do (and your CNC machine’s capabilities must be factored in). While we cannot provide detailed instructions on the use of CAD and CAM software, we are happy to tell you that the Internet is filled with discussion, photos, trial software, and more. There are numerous companies that sell CAD and CAM applications, and there are many free and/or open source alternatives. You’ll probably wish to read some reviews, participate in some web discussions, and get a feeling for what software is out there that will be best suited for your purposes. As for Control software, the same situation exists—there are free and pay-to-use software solutions when it comes to Control applications. Fortunately, we’re able to provide you with a link to download a fully functional Control application that won’t cost you a penny. It does have some limitations (we’ll talk about those), but for the purposes of testing your new CNC machine and performing some basic tasks, you may find that the free version is all you’ll ever need.
