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A Tinkerer's Guide to CNC Basics

A Tinkerer's Guide to CNC Basics

By : Najia
4.7 (10)
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A Tinkerer's Guide to CNC Basics

A Tinkerer's Guide to CNC Basics

4.7 (10)
By: 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)
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11
Chapter 11: Building a More Capable CNC Machine

Selecting the right end mill

A common theme so far has been that the end mill should be as sharp as possible. While they certainly wear differently depending on what and how they are made as well as what materials they have been used with and at what speeds, you should still consider your bits as consumables. Most kit-built 3018 machines will come with a handful of end mills (some as few as two and at least one kit I built had none). You should also consider different collets to accommodate the various end mills. A collet is the flange or sleeve that you insert into the spindle end that holds the end mill in place. On a common hand drill, this translates to the chuck, which you tighten by hand with a key. Other machines that use collets include Dremel tools. Here’s a picture of some collets that came with my spindle; note how the hole diameters differ. This allows you to use different bits in your machine:

Figure 3.2 – Sample collets

Figure 3.2 – Sample collets

Different...

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