There may be almost as many DIY CNC designs as DIY CNC. This is not wrong! We really like the [maxvfischer] document on GitHub, which introduces the machine he made based on the design of [Ivan Miranada].
In addition to the complete list of materials, there are also Fusion 360 files and very good instructions. Even if you are building a similar machine, there are a few tips that seem to help.
The machine uses HTD5M belts instead of the more general lead screw design. Everything is sliding on the MGN12H slide. There are detailed photos that not only cover the tricky part, but also how to extend the stepper motor wires.
The original design used Makita RT0700C as the main shaft, but [max] could not find one of them, but found a similar version with the same size.
The only tip we want to add is to be careful when using taps in handheld drills. (Don't ask how we know it.) Drill press is safer, or you can even use the tap handle and follow the old-fashioned way.
The firmware is grbl on the Arduino, and there are also complete setup instructions. We were surprised by the number of pictures included and the detailed description. If you have ever worried about not being able to copy CNC projects, then this may be the problem you want to solve.
Of course, there are options with fewer features, cheaper, and simpler options. Some are even provided almost free of charge by local trash cans.
Good documentation. I also particularly like that it does not use expensive extrusions. Yes, a little more work and drilling, but it is obviously a labor of love.
It will also be much harder than the extrusion-you get a better machine because the effort of drilling and tapping is cheaper-I hope to do something similar, but using steel and epoxy and sand/ Gravel infill to make a stronger machine. This fits my space this year, maybe next year-it all comes down to finding time/space and money...
I'm not entirely sure if the box tube is harder than the 8020 extrusion, but I think the epoxy granite or epoxy sand filled box tube is obvious! Don't know why I didn't think of this. When I think of epoxy granite, I think of the challenges involved in making a filled composite table, but now...
You can even try to use tensioned cables to further strengthen your pipeline. You have to insert one end, connect the cables that run through the entire pipe, pour in the epoxy granite of your choice, then pull these cables with considerable force (by connecting them to the steel frame and tightening the cables with bolts and nuts) and wait for it to solidify. After curing, the additional pressure will further strengthen your pipeline and dampen some vibrations.
8020 is really free to twist, and it is easier to bend than a square tube of the same wall thickness and size-it is actually a small round tube with tabs to connect it to a square profile-so in fact, for many loads, It actually doesn’t really work, but the small round tube in the middle doesn’t mean you can’t use it to make a good machine, but between the ease with which it can be twisted and bent, you have to be more careful about the geometry, Add restraints or more squeezing to counter this trend.
When you say that... yes.
It is not a DIY CNC, it uses grbl for this. However, it is a DIY CNC router.
Thank you for saying that, so I don't have to say it.
"CNC" means computer numerically controlled machine tool, just as "drill" means drilling machine. But even if you don't accept this, CNC is not just about microcontroller boards. It includes the computer that actually provides the G code and the motor that moves the workpiece and/or tool. I think the integration of these devices into a working system is called "DIY" is not an exaggeration. I am not saying that this is particularly difficult; I am saying that he did it himself.
The problem is that they call the machine "CNC". CNC is "computer numerical control", not "computer numerical control machine tool". Many times you will hear people talking about "CNC" or saying they "go to CNC", both of which ignore its actual type. Most of the time, they seem to assume that "CNC" means "router" or "milling machine", but this is not the case. The correct usage should be CNC router, CNC milling machine, CNC lathe, CNC laser, CNC plasma cutting machine, etc. A recent article mentioned the process they call "simulated CNC" because all their cutting is done by hand, which is especially shocking.
The counterexample I used recently is that I did something in my manual. This tells you that the amount of information about the machines and processes I use is the same as the amount of information I produce on the CNC.
The problem—the only problem—is that you have no control over how the language is used. We all know what someone means when they say "CNC", even if they don't paste "machine" at the end of it. This is the most important. If every time something in the language is meaningless to you, you will bend and deform, then you will have a difficult time.
By the way, your "counter-example" just shows that it is more important for you to take a (meaningless) position than to communicate with others. If you say in your "handbook" that you "did something", you are stating that you don't want to be understood. Do you think this will allow the rest of the world to use words in a logical way? Hint: They are not. once.
I have tried to take a stand on the use of "twice slower", "250% reduction" and similar nonsense. These battles are really not won.
It's more like people don't actually understand the words they use. That is, they choose a word because they like its pronunciation, not its meaning.
I saw a lot of meaningless things such as "website work" and "copy writing" without understanding the meaning of each word.
It seems like a good idea to use a battery-powered drill for tapping. Most of the problems I have encountered when tapping with a manual handle are caused by uneven force distribution. Using big things helps stability.
Check out rootcnc https://rootcnc.com/ This is a similar but more mature project, it has 45 degree aluminum to improve rigidity
It seems that the 45° angle is to allow the wheel carriage to track well and automatically center, placing the weight on two faces at an angle to each other. Although it will eliminate the play in motion (assuming the processing force is less than the weight of the bracket), which is good, I can't see how it can increase the rigidity of the frame.
Spiral point taps and spiral flute taps perform well in drill bits. The traditional manual faucet is easy to break.
No matter how you use them, as long as you place them next to the vaguely hard material to be cut, the cheap crappy faucet will break (of course not exactly, but it’s an area where cheapness really won’t reward you, because it Will destroy and take you a long time to retrieve or scrap the parts).
Calling it "CNC" is like calling an electric drill an "electric drill" without having to determine its type. 3D printers are "CNC" like routers, as are CNC lathes, CNC milling machines, CNC robotic arms, etc.
Many people misuse the term "CNC" to mean "CNC router".
I think it's like calling an electric drill a drill bit. CNC is a controlled process, just like a drill is a machining process, but when you ask for a drill, people still know what you want.
CNC is the control process, not the machining process. By calling any CNC-enabled machine "CNC", you are ignoring information about the basic process you are pursuing. I can use a normal router or CNC router to cut the mortise on the chair leg, but it is not a good idea to use a CNC lathe to cut the mortise on the chair leg.
When describing tools, CNC is an adjective, not a noun or a verb.
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