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OX AI

Discussion in 'CNC Mills/Routers' started by Robert Hummel, Feb 3, 2014.

  1. Morten T

    Morten T New
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    Hi Robert
    I like this kit you make, and I have been looking in to build a small CNC, and this open build is lookingfantastic easy and good.
    So I wonder how much you charge for a kit, and shipping to Norway? Have you many in order now, I'am not i a hurry.
    Send me an E-mail: [email protected]

    And one more thing, this RC spindle, where did you get it from?

    Best Regards
    Morten
     
  2. Jestah

    Jestah Well-Known
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    Robert makes the spindle kit himself and might be able to add it on to the kit you want to order.

    I HIGHLY rate his work and can recommend a full kit as a FANTASTIC start to get into the hobby of CNC routers. The craftsmanship is top notch, finish is stunning and packaging for transit is very secure.
     
  3. John Furjanic

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    Hello Robert
    I am new to this forum and CNC world in general but I am very interested in your build and would love to build one for myself. Do you make any of the plates for sale to others? I would be interested in the details by either an pm or email sent to [email protected]
    Thanks, Really great build.

    John
     
  4. Robert Hummel

    Robert Hummel Custom Builder
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    Drag chain installed and the fit is good :D
    image.jpg
     
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  5. DiggerJ

    DiggerJ Journeyman
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    Did you print it or buy it? Looks good.
     
  6. Robert Hummel

    Robert Hummel Custom Builder
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    Got it from eBay :)

    Printer is in the works but I have made up my mind and finishing the OX AI first :p
     
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  7. Techsavvy34

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    What is the size of that drag chain Robert?
     
  8. GrayUK

    GrayUK Openbuilds Team Elder
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    Looks Huge! :D
    Huge is good. :thumbsup:
    Gray
     
  9. Robert Hummel

    Robert Hummel Custom Builder
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  10. GrayUK

    GrayUK Openbuilds Team Elder
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    So, not as Huge as it looks. Mmmm :jawdrop:
    Still, looks like there's a lot of room in there. I'll save that dealer.

    Gray
     
  11. Robert Hummel

    Robert Hummel Custom Builder
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    Yep tons of room, fit just as I hoped and looks good :thumbsup:
     
  12. Ben Urbano

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    Hi all :)
    After investing in this kit, I'm considering getting it coated/plated for protection and long life.
    Could you recommend a preferred type for CNC applications, I was thinking about sending the kit for nickel plating?
    A tad new to CNC, commencing in building my first CNC in the coming weeks.

    Thanks for any help :)
    And cheers to Robert and Mark, Amazing work.
     
  13. Robert Hummel

    Robert Hummel Custom Builder
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    Ty !
    I would say anodize or powder coat them.
    I personally would powder coat :)
     
  14. Ben Urbano

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    My brother in law is helping out cause he works part time at powdercoater.

    I scored some anti graffiti finish which is a lot smoother. Ill post some pics when I get them done.
     
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  15. Robert Hummel

    Robert Hummel Custom Builder
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  16. GrayUK

    GrayUK Openbuilds Team Elder
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    Never heard of that before. It's not in Pink is it? :D

    Gray
     
  17. Robert Hummel

    Robert Hummel Custom Builder
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    Just be sure the holes are papered so no coating gets inside.
    You may have to re-tap the m5 holes if coating gets inside
     
  18. Boyd

    Boyd New
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    Robert
    When you get some time could you send me the prices on each of your kits with shipping to San Diego?
    My email is [email protected]
     
  19. Robert Hummel

    Robert Hummel Custom Builder
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    PM Sent ;)

    We'll I had some free time to start the controller side of things
    Here you see the four stepper drivers mounted to a aluminum bracket that will mount in the controller housing
    They are held in place with M3 hardware and have thermal paste between them and the bracket.
    Should also aid in heat exchange keeping things cool, not that they will be set to their max of 4.5 amps
    Rather 2.8 as the openbuilds motors call for :)
    image.jpg
     
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  20. Rick 2.0

    Rick 2.0 OpenBuilds Team
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    Robert, what board are you hooking those up to?
     
  21. Robert Hummel

    Robert Hummel Custom Builder
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    They will be controlled from a standard BOB with parallel port connection and Mach3

    image.jpg
     
    #321 Robert Hummel, Sep 22, 2014
    Last edited: Sep 22, 2014
  22. Rick 2.0

    Rick 2.0 OpenBuilds Team
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    Robert, when you get to putting this all together if you would be so kind as to document how all the extras (limit switches, etc.) connect into this board, it would be greatly appreciated.
     
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  23. Ben Urbano

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    Gday all,

    Hahaha pink powder-coat, Naaa as tempting that is. So far I know you can find black, white, yellow and red.
    I will post the name and model of powder used when I get the info.

    I got a bunch of rollie cigarette filters from another mate, perfect for plugging up 5mm holes, though I have drill taps and taps on the way just in case.

    Robert, Can you let me know what your drag chain is resting on? Is it a piece of 20x40?
    If it is 20x40 v rail, I guess it also improves stiffness quiet well?
    Anyone else with suggestions or recommendations please let them at me ;)

    Thanks
     
  24. Robert Hummel

    Robert Hummel Custom Builder
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    It connects to the rear 20x40 and a 90 black bracket, 2 x 8mm M5, 1 x nut and 1x tee nut

    On the X side 70 mm M5, 1x 1/4 spacer and nut to lock down the threads
     
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  25. Martin.Barfoed

    Martin.Barfoed Journeyman
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    Hi Robert

    Finally I got around to try milling the aluminum parts. However, I did not get far :( as I manage to break two bits and all I had milled of the front brace, was this:

    [​IMG]
    I used the 10"/min speed and 5"/min plunge as you have in the .skb file. I used 2mm carbide bits specifically for aluminum and lubricated w 96% ethanol.

    Can you, based on your experience in milling aluminium give me some advice?

    Thanks, Martin
     
  26. Robert Hummel

    Robert Hummel Custom Builder
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    Bits snapping is not a good thing at all.
    First thing is the end mills from eBay have never really worked for me and snap fast
    Next how fast is your spindle operating "RPM"?
    One other thing is chip extraction did you keep things clean?
    Do you have a link for the end mill used?
    A higher spindle speed would be good but if you don't have it then just keep the chip load proper and you should be ok.
    I use 55 degree helix end mills and the performance over the standard end mills is night and day , the chip evacuation is incredible , the chips push up the flute and are thrown clear of the part , they can handle heavier cuts , there's less chatter and generally the surface finish is much better due to the shear the tool provides with that much of a cutting angle .
    My preference is to avoid the use of standard end mills for any aluminum cutting .
     
  27. Rick 2.0

    Rick 2.0 OpenBuilds Team
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  28. Robert Hummel

    Robert Hummel Custom Builder
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    I have a local supply KBC tool that I go to.
    Little costly but bits last a lot longer
    I also have a new type I'm about to try on the next few sets of OX plate sets, they have a ti-coat to improve life and cut.
    A 1/8" two flute high helix is $25 after taxs
    Have yet to snap one, have snapped all eBay bits
     
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  29. Robert Hummel

    Robert Hummel Custom Builder
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    A note when using high helix bits, be sure to secure your work well.
    If the bit hits a soft spot or chips it can pull up with a lot of force
     
  30. Martin.Barfoed

    Martin.Barfoed Journeyman
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    Hi Robert
    Thanks for a fast reply!
    I use a Kress spindel running ca 30oooRPM (setting 6 = full speed)
    I did use a vacuum during milling, however the lubricant made it sticky so only some of it was removed. The snapping happened when milling the ├ś5 holes
    The bits are from AliExpress: http://www.aliexpress.com/snapshot/6190748030.html
    There is no mentioning of the angle but it looks like 45.
    I do also have some from Inventables : https://www.inventables.com/technologies/center-cutting-end-mill#25295-02

    Br, Martin
     

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