Most 3D printers use plastic filament extrusion technology. Hollow parts are easy, and it is important to take advantage of that to reduce your use of the plastic resins when making parts. For example, you could create a whistle like the one shown below and extrude the little ball inside the whistle as part of the process. There are some distinct advantages to additive machining in that you can make parts that would be extremely difficult to make with subtractive or conventional machining.
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We also did a complete series on building a Rostock Max v2 3D Printer.ģD Printers do what’s called Additive Machining, because they add material rather than cutting it away. We did a multi-part series that gives a great introduction to 3D printing that will tell you a lot about them. They may look like tinker toy creations, especially the DIY 3D Printers, but they’re capable of surprisingly sophisticated work. In all likelihood, the simplest and most inexpensive machine to get started with is a 3D Printer.
A big one takes a fair amount of room in your shop, but on the otherhand, you could live without some of your other wood working machines in all likelihood if you had one.Īlmost anything you’d like to make from wood, plastics, or if the table is up to it, soft metal. These machines are aimed at wood, plastic, and if you have a well-made rigid machine, soft metals like aluminum. You can offset that by buying parts kits and plans. This is a bigger project than a plasma table and will take longer to complete. However, you can save a lot of time and effort at very little additional cost by trying a DIY CNC Router kit like the Shapeoko. Consider one to be equivalent to a fairly in-depth woodworking project. These machines will be more work than a plasma table.
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Another factor driving increased cost is you will need to purchase CAM software of some type to get full benefit from a DIY CNC Router. And there are 3 axes as well as a spindle (often just a handheld router in a bracket) to consider. If you want to cut aluminum and other soft metals, you’ll need a fair bit of rigidity. Medium: The table needs to be a little more accurate than a plasma cutter. I’m going to tackle them in rough order of cost and complexity.īut first, if you already have a machine, please take our Hobby Machine Survey so you can see the results of what kinds of machines other hobbyists have. Let’s run down the machine types that are available and comment a little on how they fit with the various questions I asked you to consider. Projects: What do you want to make with your CNC machine? This will greatly affect the type of machine you build as well as the required specifications for that machine. You will have learned a lot on the simpler machine and you’ll be that much more ready to tackle a complex machine. But how much time can you realistically devote to the project? How much of your interest revolves around creating the machine itself versus using the machine after it is done? Consider that it may be a good idea to go all the way through getting a simpler machine working before graduating to your ultimate CNC project. Time: Given enough time, you can manage to build almost anything. Strong woodworking versus strong metalworking skills will affect your choices too. Some will be happier with tolerances that are a little looser and easier to achieve. Some machines will be much easier to build than others. Get a real honest assesment of the level of cost you’re willing to deal with for the project.ĭifficulty: Close behind cost will be a realistic assessment of the skills you can bring to the table in building your machine. Some will require more software or tooling than others, which adds additional expense. Try this questionaire:Ĭost: How much can you afford to spend on your CNC machine? Some are more expensive than others. The first thing you’ll want to do is make some notes about some of the questions you’ll want to understand up front.
We’ll try to create a framework you can use to decide what your first CNC project should be. So you want to build a CNC machine, but you’re not quite sure what kind of machine to build? Then this article is for you.
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