Book Image

A Tinkerer's Guide to CNC Basics

By : Samer Najia
5 (1)
Book Image

A Tinkerer's Guide to CNC Basics

5 (1)
By: Samer Najia

Overview of this book

Until recently, Computer Numerical Control (CNC) machines belonged to the realm of heavy industry, but as technology becomes cheaper and smaller, these machines now can be used in home workshops. It’s not easy to get started, though, but thanks to this guide, you’ll be ready to take on a variety of projects in no time. A Tinkerer’s Guide to CNC Basics contains everything you need to get set up at home with computer-controlled machining and fabrication. Sparing you the theory, this project-laden guide helps you learn by doing. Once you’ve got to grips with the principles of CNC and installed the 3018 Pro CNC machine, you’ll gradually move from simple projects such as basic engraving to more complex milling and machining techniques. You’ll even learn how to upgrade your machine to accomplish more sophisticated designs. The plethora of projects in this book will keep you busy and give you the practice you need to get started with your computerized workshop. By the end of the book, your computerized home workshop will be one step closer to realization, and your machining skills will be taken to the next level.
Table of Contents (15 chapters)
11
Chapter 11: Building a More Capable CNC Machine

Configuration settings

The settings for any given project or cut will revolve around several parameters. However, in this section, let’s review some basic settings I use to smoke-test every workpiece.

End-mill diameter

You must always determine how much room your toolhead has to move between lines. If you have two cut lines that are very close to each other and the diameter of the end mill will span that gap, a design revision may be needed, or a revised selection of end mill or material will be necessary. Generally speaking, this will be apparent if you look at your toolpath and determine that two cut lines come too close together. Of course, the depth of your cut plays a role here as well. If we have a non-uniform end mill (where the cut width will change with the depth) then the toolpath is something to consider. For most of what I do, I stick with a few common bits for my 3018 machine and so I do not change the bit radius/diameter once I have set it. If I am using...