Cnc Machine

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Introduction: Cnc Machine

Step 1: Drawing the Machine

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

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

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

stuff i made with the machine.

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    user

    We have a be nice policy.
    Please be positive and constructive.

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    28 Comments

    at low speed shouldn't have any problems, maybe you can run 150 mm per minute, but it's very slow

    Sir....i am india...engineering student...you project details sent my mail...
    Please
    My mail :-
    mynamebalakrishnan@gmail.com

    Would you like to reduce the backlash?

    It is very Easy , i think :) www.dumpster.com is a link with antiback lash solutions and cheap

    Otherway you can DIY with a pieces of HDPE High Density Poly Ethilene ( Polietileno de alta densidade , ex tábua de cortar pão)

    In a shop of specialized plastic materials you can take it very very cheap!!

    My Email

    nunotec@hotmail.com

    13-anti-backlash-lead-nut.jpg14-ab-lead-nut-mounted.jpgimagesEE7QVCUV.jpg

    VERY VERY GOOD PROJECT I WOULD LIKE TO BUILD IT

    IT SEEM YOU ARE PORTUGUESE , I AM TOO, I AM FROM OPORTO

    BEST REGARDS

    NUNO

    user

    This looks awesome!

    I'm quite curious, what kind of accuracy / precision do you get?
    and what depth can it cut?

    1 reply

    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.

    What is the coiled yellow line for? Is that compressed air or a vacuum?

    4 replies

    for design i use adobe illustrator or solid works. For the gcode i use Mastercam or Cambam

    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.

    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

    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.

    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.

    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

    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.

    it's just a ordinary router, only costs me about 30€

    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.

    the bearing is a skate board bearing 22mmx7mm inside hole is 8mm

    try this : https://docs.google.com/folder/d/0BzIRbajTFEHEWnpFdUl5QWlyYkk/edit