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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

Differing approaches to motion in CNC machines

Depending on the nature of the machine itself, the motion system can vary based on the rigidity requirements of the toolhead. Very frequently, a compromise is struck between speed and rigidity (or stiffness) so that cheaper or more readily available components may be used. The most common of these tradeoffs is allowing X- and Y-axis motion to be driven by belts while the Z-axis motion operates using a leadscrew. Other designs use leadscrews throughout.

The following figure shows one of my four 3018 machines:

Figure 1.2 – A 3018 machine (see Figure 2.1 for an annotated close-up picture)

Figure 1.2 – A 3018 machine (see Figure 2.1 for an annotated close-up picture)

In the preceding figure, note the controller on the right. This picture was taken just prior to calibration. This is a machine that can be purchased online as a kit. It is made from some off-the-shelf parts (8020 aluminum extrusions, 8-mm steel rods, stepper motors (which are used for motion), leadscrews, and an engraving...

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