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Picture of cnc machine
 
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Step 1: Drawing the machine

Picture of Drawing the machine
desenhotecnico.jpg
I started by creating the design of the machine on SolidWorks.
On the PDF i put all the measurements.

Step 2: Start construction

After seeing all the measurements, I calculated the amount of iron that I would need to build the machine. It was something like 16 meters of square tube.

So I bought two bars of six meters square tube 20*20*2, one bar of 6 meters square tube 25*25*2 and one bar of 6 meters angle iron 25*25*3.

Then I started cutting and drilling holes in all parts according to the technical drawing.
after that i started welding the parts.


Step 3: Motors and drivers

Picture of motors and drivers
IMG_20120823_001523.jpg
i bought on ebay one kit of stepper motors with driver and power supply.
The steppers are Nema 23 Stepper Motor 287oz-in

Step 4: Final product

Picture of Final product
IMG_20121124_180743.jpg
Overall, the machine is good, just not fast enough because i use a m8 screw as lead screw. 
So the machine only can do 300 mm/m

Step 5: Some stuff

Picture of some stuff
IMG_20121124_180251.jpg
IMG_20121124_180304.jpg
IMG_20121124_180321.jpg
stuff i made with the machine.
R-A6 months ago
This looks awesome!

I'm quite curious, what kind of accuracy / precision do you get?
and what depth can it cut?
speed_hack (author)  R-A6 months ago
It has a good precision, but have a little bit backslash. The depth of the cut depends of the bits, but i think 70mm it`s the max.
J,R,D, Ltd8 months ago
What is the coiled yellow line for? Is that compressed air or a vacuum?
speed_hack (author)  krissh00091 year ago
for design i use adobe illustrator or solid works. For the gcode i use Mastercam or Cambam
speed_hack (author)  krissh00091 year ago
i used m8 screws as a lead screw i think is 1.5 mm/revolution or something close. X axis have +/- 800mm Y axis have 1000mm and the Z axis have +/- 250mm or 300mm i don't remember.
speed_hack (author)  krissh00091 year ago
here in the end of the page
http://www.wantmotor.com/ProductsView.asp?id=160&pid=75&sid=80
you have the graphics of the motors, here you can compare the better speed/torque racio
speed_hack (author)  krissh00091 year ago
at low speed shouldn't have any problems, maybe you can run 150 mm per minute, but it's very slow
speed_hack (author)  krissh00091 year ago
i bought the same as option 1. my opinion is that the first option is the one that has the strongest motors. The drivers are the same on both options. the secund have couplers .. hmm i dont know. i think the motors are the more important thing.
kapriece1 year ago
how hard was it to tweak the software?
speed_hack (author)  kapriece1 year ago
a little bit, i still have some problems with backlash but isn't a big deal
You can compensate for backlash in Mach 3. It works really well.
speed_hack (author)  krissh00091 year ago
my motors came with mach3, the same i send to you. i dont know other software. for that you have foruns like cnczone, they talk about this things
speed_hack (author)  krissh00091 year ago
hello, it's the same i bought, the only problem of this motors at high speed they lose a lot of torque.
if you go to they website you can see the graphics i think is wantmotor or something like that.
speed_hack (author)  krissh00091 year ago
it's just a ordinary router, only costs me about 30€
speed_hack (author)  krissh00091 year ago
the lead screw i used is a m8 screw with 1 meter and a nut is m8 m8 = 8mm
and my spindle isn't connected to the board.
speed_hack (author)  krissh00091 year ago
the bearing is a skate board bearing 22mmx7mm inside hole is 8mm
speed_hack (author)  krissh00091 year ago
try this : https://docs.google.com/folder/d/0BzIRbajTFEHEWnpFdUl5QWlyYkk/edit
e.ma.niak1 year ago
Im new at this, so before i start i want to know: How did u calibrated the CNC? (how does it know how big is 1cm...) And is there a difference between USB and Paralel control, i mean does the same software operate with both?
Atman81 year ago
What do you think about the performance of the motors? I'm trying to decide what size to buy.
Brittond141 year ago
Good job brother. How heavy is your machine?
speed_hack (author)  Brittond141 year ago
thanks bro. maybe 30 or 40 kg
speed_hack (author) 1 year ago
Yes please, some tips are always welcome. My problem with these motors is that the faster they go more torque they loses.
This motors are rated 8volts 1Amp
sorry my english, some times i have to use google translate :P
speed_hack (author) 1 year ago
For the motor couplers i'm using a piece of rubber pipe tied with zip ties.
and the motor driver is a TB6550
Yay rubber hose FTW! If you'd like I could tell you how to tune your motor drivers up to get them to run better. I know about TB6560AHQ motor driver ICs because I made my own drivers with them. That made me to learn all about the things.
sleeping1 year ago
Can you show a picture of the motor couplers. What type of motor drivers are you using. Thanks
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