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Aluminum OX build with some modifications

Discussion in 'CNC Mills/Routers' started by Dave Zahn, Dec 25, 2014.

  1. Dave Zahn

    Dave Zahn Well-Known
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    Dave Zahn published a new build:

    Read more about this build...
     
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  2. Tweakie

    Tweakie OpenBuilds Team
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    Nice work Dave. :thumbsup:

    Thanks for posting the build - I certainly like the progressive idea of using the machine to make the next generation of plates etc.

    Tweakie.
     
  3. MTO

    MTO Well-Known
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    I'm curious about the router motors. It looks like Grandpa is using something water cooled, while the OX has a small makita router. The water cooled motors are usually higher powered, so I'm curious why you didn't move it over to the presumably better/newer CNC?
     
  4. Dave Zahn

    Dave Zahn Well-Known
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    The spindle on Grandpa is just a simple DC spindle bought online. It doesn't have the torque that the new router has. The only thing I wish was that I could use the digital speed control from Grandpa on the new OX CNC (name... Young Whipper Snapper??... nah)
     
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  5. Dave Zahn

    Dave Zahn Well-Known
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    Word to the Wise: After having severe backlash problems, I decided to check all the belts. Belts were fine but in the process of pulling them off, I noticed the X axis pulley was loose. The teeny tiny set screws holding it to the stepper motor's shaft had apparently worked themselves loose. So, my word to the wise is: Locktite!

    Locktite is your friend! :)
     
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  6. GrayUK

    GrayUK Master
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    It is a common problem Dave. Consider increasing the flat area on the spindle as well, to get a situation whereby the spindle can't turn even if the screw is a bit lose, short of the screw falling out.

    Gray
     
  7. Dave Zahn

    Dave Zahn Well-Known
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    Thanks! I bought some M3 screws that have a larger cup head. This way I could tighten them without stripping out the allen screw. I'm not so worried about creating an off balance wobble because the steppers don't spin all that fast. I also used some Locktite Blue (removable with handtools) to lock them in. Hopefully won't have the problem again.
     
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  8. Dave Zahn

    Dave Zahn Well-Known
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    Does anyone know where I can find stronger G3 belts? I'm thinking kevlar reinforced or something like that.
     
  9. Roy Eddy

    Roy Eddy New
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    where did you get all the plates to build your ox ?
     
  10. Dave Zahn

    Dave Zahn Well-Known
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    Roy, I had an old cnc mill that I had made of wood. I used that to make plates out of acrylic.
     
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  11. BNMaker

    BNMaker New
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    I have enough openbuilds extrusion, wheels and motors to make three Oxen. I initially bought a set of Ox alloy plates from Australia but buying aluminium plate here is going to be difficult. Do you think 20mm acrylic would be strong enough for basic wood carving/routing?
     

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