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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
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Building a bigger 3018

Looking at the structure of the 3018, you can see that carriages are dependent on 8 mm rods (and, in some models, 10 mm rods). For short distances, this is fine. I have a Core XY 3D printer that uses 8 mm rods for the X and Y carriages that are some 24” long. When I upgraded the printer, I had to make sure that the X-carriage and Y-axis parts kept the assembly light enough to allow the rods to bend. Obviously, the longer the rods, the more there is a propensity to bend – and even a little bending is not good. The 3018 adds rigidity by having two rods, but even then, there is a chance, under load, of the rods flexing just enough to make your cut inaccurate enough to matter. That more likely applies to really long lengths of rod, so for the 3018, if you want to use the same method for motion, I suggest you do not make the work area more than twice the base size.

There is another factor to apply here. Even if you can use rods that are stiffened...

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