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Longhorn OX (Under Construction and In Progress)

Discussion in 'CNC Mills/Routers' started by nlfawcett, Mar 24, 2015.

Longhorn OX (Under Construction and In Progress)

Longhorn OX (Under Construction and In Progress)

Discussion in 'CNC Mills/Routers' started by nlfawcett, Mar 24, 2015.

I ran across the OX and knew it was the one I wanted to build. Some of the things I wanted to include was make it bigger and a little more solid than what the original plans called for. So here is where I am at so far. It will have a cutting area of 48" x 48". The waste board support frame will have more support rails. The Y axis will have (3) 20mm x 60mm rails instead of the original (2) that is called for. 1/4" aluminum OX plates. And a few more odds and ends.

Longhorn OX openbuilds cnc big
  1. nlfawcett

    nlfawcett New
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    nlfawcett published a new build:

    Read more about this build...
     
    #1 nlfawcett, Mar 24, 2015
  2. Neilyboy

    Neilyboy New
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    Fairly certain you forgot to post my favorite pic of your build! You know, the pic you sent me when you had that feeling of 'yup this just got real'. I wish ya the best of luck buddy. Now if I can just finish up my delta.six build (**** kids).
     

    Attached Files:

    #2 Neilyboy, Mar 24, 2015
    sgspenceley likes this.
  3. Motions

    Motions Well-Known
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    Really interested in how that spindle works out for you.
     
    #3 Motions, Mar 24, 2015
  4. Dale Mahan

    Dale Mahan New
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    How big is the table you have the CNC machine mounted on. As a former machine design engineer for Ferguson Machine, I found that when I reinforced the weakest part of a machine that flexed in reaction to cutting forces, the deflection just moved to the next weaker part. Since you have stiffened the Y-axis rails, do you think that the gantry plates will be the next part to flex?
     
    #4 Dale Mahan, Mar 29, 2015
    Joe Santarsiero likes this.
  5. Dale Mahan

    Dale Mahan New
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    The water-cooled spindle should get you a reduction in machine cutting noise. Best of luck.
     
    #5 Dale Mahan, Mar 29, 2015
  6. nlfawcett

    nlfawcett New
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    The table it is sitting on is 6' L x 5' W x 30-1/2" T. Thinking about the build I did consider that there might be some flex in the Y gantry plates. My plan is to add a second set of plates in the future and basically have it setup similar to the Z gantry. I also considered doubling up the X axis rails. Any ideas would definitely be helpful though if you got any. Cheers!
     
    #6 nlfawcett, Mar 29, 2015
  7. nlfawcett

    nlfawcett New
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    Thats what I thought as well. It is a very quiet running spindle. Haven't tested it under cutting load yet. I think it will do the job. Cheers!
     
    #7 nlfawcett, Mar 29, 2015
  8. Ronald van Arkel

    Ronald van Arkel Veteran
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    Looks familiar ;) :
    IMG_0035.JPG
    Still needs the belts, acme, and corner 5-hole 90º plates....
     
    #8 Ronald van Arkel, Mar 29, 2015
  9. Dale Mahan

    Dale Mahan New
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    In working with machine deflection, I normally put instruments on the machines at rest and as they are cutting, and record the deflections for comparisons with the results of any reinforcements that I might do. You have to have a deflection goal in mind and when you attain it - quit. There will always be deflection under load, you can't eliminate it. The smallest it can be is when your instruments no longer show any significant difference between the machine's loaded and unloaded state. That only means that the deflection there is has been reduced to insignificance, not that it has been eliminated! Suggest starting measurements and keeping records. Then you can see the material cost per thousandth of an inch that the improvements require. Many times, it's not worth the extra expense.
     
    #9 Dale Mahan, Mar 30, 2015
  10. Neilyboy

    Neilyboy New
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    Updates! Updates! Updates! quit playing video games and show us your progress ;)
    I just had to bug you so you would post some more pics and keep you active!
    Neil
     
    #10 Neilyboy, Apr 14, 2015
  11. nlfawcett

    nlfawcett New
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    Hey, when you post your 3d printer build and show your progress, then I will be more motivated to get mine built. Until then, shut your pie hole...
     
    #11 nlfawcett, Apr 14, 2015
  12. Neilyboy

    Neilyboy New
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    See all that time spent playing GTA is wearing off on ya. Does your mother know you talk like that :) lol, yeah yeah.. 4 kids leave me no free time! I will get that thing built! See the problem is I need you to get this built so you can cut me a base like Robert has made here http://openbuilds.com/threads/delta-six.339/page-9#post-15241

    pretty please :rolleyes::rolleyes::rolleyes:

    Neil
     
    #12 Neilyboy, Apr 14, 2015
  13. nlfawcett

    nlfawcett New
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    Find me some 20 tooth GT3 pullys for a 10mm stepper motor shaft and then we will talk, till then it's GTA everynight for me
     
    #13 nlfawcett, Apr 14, 2015
  14. Neilyboy

    Neilyboy New
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    #14 Neilyboy, Apr 14, 2015
  15. Rick 2.0

    Rick 2.0 OpenBuilds Team
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    #15 Rick 2.0, Apr 14, 2015
  16. nlfawcett

    nlfawcett New
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    I have 425oz nema 23s, but they have a 10mm shaft. I assumed that there wouldn't be enough material left. Would a 32 tooth work for my setup? If so, what kind of changes would I have to make in my settings If I went with a 32tooth?
     
    #16 nlfawcett, Apr 14, 2015
  17. Rick 2.0

    Rick 2.0 OpenBuilds Team
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    B&B has a 24T with 5/8" hub which could easily be drilled to 10mm. But as they make what they sell and have no problems with custom work, you could probably just have them make some 20's with a larger hub and a 10mm hole.
     
    #17 Rick 2.0, Apr 14, 2015
  18. Rlwilson2

    Rlwilson2 New
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    I am looking at starting a 48 x 48 machine very soon... Did you cut the plates on 48x48 OX thread? How stiff does everthing feel?
     
    #18 Rlwilson2, Jul 11, 2015
  19. Neilyboy

    Neilyboy New
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    Yeah Nate how is that build coming along?!?!?
    Neil
     
    #19 Neilyboy, Jul 16, 2015
  20. JediMindTricks

    JediMindTricks New
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    X2 on your build progress. Looks great. I want to build one but want to hear about your exp. first.
     
    #20 JediMindTricks, Aug 9, 2015
  21. Rlwilson2

    Rlwilson2 New
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    Waiting to hear how the gantry and belt drive is working..
     
    #21 Rlwilson2, Aug 18, 2015
  22. Jay Matthiesen

    Jay Matthiesen New
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    I am wanting to build a 8' long x 4' wide machine cutting area. Any ideas how I can gang the 1500mm L x 80mm H tubes to eliminate deflection to a manageable level?

    I see someone created a splicer to be able to bond two aluminum rails together to make a longer rail, so I can get the length, now I just wonder about the deflection.
     
    #22 Jay Matthiesen, Sep 15, 2015
  23. Adam Filipowicz

    Adam Filipowicz Journeyman
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    where did you get that spindle?
     
    #23 Adam Filipowicz, Sep 18, 2015
  24. Joe Santarsiero

    Joe Santarsiero OB addict
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    They're all over the net. Google water cooled spindle. or Chinese spindle motor.
    The gray HY vfds that a lot of packages have aren't the greatest.
    You'll likely be better off in the long run finding a used Allen Bradley or a good Lenze on eBay.
     
    #24 Joe Santarsiero, Sep 19, 2015

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