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OpenBuilds OX CNC Machine

Discussion in 'CNC Mills/Routers' started by Mark Carew, Dec 15, 2013.

  1. Jay_r

    Jay_r New
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    It might drone or amplify sounds, depending on the thickness of the sheetmetal.
     
  2. Bmoz

    Bmoz New
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    Yuck....I didn't think of that Rubber leveling feet it is
     
  3. Jay_r

    Jay_r New
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    You might consider adding a plywood top to the cabenet. I have my lathe mounted on an old sheet metal office desk with 3 sheets of plywood for the top. Before I added the plywood, it was considerably louder and less ridgid, with the majority of the noise comming from the desk itself. Then again, my lathe dosent come close to the higher pitched spindle speeds of a router. Your mileage may vary.
     
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  4. Todd Powell

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    I'm just getting started and gathering up parts. Neither of the stepper motors or the control are available from the store or the supplied links. I was looking at this combo available on e-bay.

    http://goo.gl/4AWKDF

    Any help or point me in another direction is appreciated.
     
  5. GrayUK

    GrayUK Openbuilds Team Elder
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  6. Mark Carew

    Mark Carew OpenBuilds Team
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    I found this out as well justintime. I found a fix at one point on cnc zone but it looks like a real pain to get it done.
    @Todd you could always support these guys (Spark Concepts). http://www.openbuilds.com/builds/cnc-xpro-driver.643/
    They have an all around nice looking driver that would get the job done.
    They also have a kickstarter going at the moment as well. https://www.kickstarter.com/projects/484774463/cnc-xpro-driver
    Where they are offering a super cool modded OX kit called Zeus that may interest you as well.
    e699792d3a87644d17cf06ffb5b10d83_large.jpg
     
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  7. Robert Hummel

    Robert Hummel Custom Builder
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    Yes stay clear of the TB6560 controllers they are not friendly to mistakes and the IC requires a power on sequence that the maker did not account for, so each time the board is powered on your risking blowing the stepper IC's.....
    I had to take mine apart and build stand alone drivers, then get a BOB and in the end payed twice the money.
    Really the kits on the bay are simply motor, power supply packages with a paper weight TB6560 PCB
     
  8. Todd Powell

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    Thanks everyone for all the great info. I ordered all the available parts via the part store yesterday. I'll continue to pick up items as they become available. If the steppers become available here before I gather everything else up, I'd rather just buy them here. I've seen a couple people order the 400w spindles off e-bay rather than using one of the router options. What are the advantages / disadvantages of the spindle rather than router? Looking forward to getting started on this project!
     
    Chris Laidlaw likes this.
  9. Charles Ely

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    An Ox is in my future. I just purchased a Makita TP0701C Compact Router (on sale for $89 at Home Depot). The motor body is a 65mm diameter, 85mm tall cylinder. I want to use the "hose clamp" mounting technique until I can cut my own motor mounts. I had an idea for an mounting aid that fits over the cast 90 degree corner brackets. The first prototype is being printed at Shapeways and should be here is a couple of weeks. You can go here to look at the design. http://www.shapeways.com/model/2067340/makita-mounting-aid.html?li=shop-results&materialId=95

    Chaz
     
  10. Charles Ely

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  11. Mark Carew

    Mark Carew OpenBuilds Team
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    @Todd Powell Sounds like you are well on your way now :thumbsup: The main difference of the cnc spindle router (that i know of anyway) is the ability to set the spindle speed via the gcode. So for instance everytime you run a plexi-glass cut your spindle speeds would be set already.
    You may want to check out the RC spindle Robert is working on as well as the software speed control circuit Tweakie is working on :)
    @Charles Ely I can't seem to open that link, but it sounds pretty cool, and I look forward to seeing it.
    EDIT Whoops we must have been typing at the same time :)
    Looks great Charles! I'm just sayin this would be a great part to share in the resources part section! :D
    http://www.openbuilds.com/resources/categories/parts.1/
     
  12. Charles Ely

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    No problem. As soon as I get a couple in my hands. It would help if I had dimensions for the 2060 extrusion and the cast 90 degree corner bracket. I'm starting with the Sketchup drawings and hoping nothing has changed since they were created.
     
  13. Mark Carew

    Mark Carew OpenBuilds Team
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    Good deal! Nope they are the same so all is good :thumbsup:
     
  14. Serge E.

    Serge E. Journeyman
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    Your plates worked like a charm with the NEMA 23s I got from StepperOnline (lots of choices, China).

    I'm using a 20x60 instead of the 20x40 for the third X axis back piece (don't ask). So the opening for the cables lines up with the inner chanel of v-slot which could allow one to completely hide some wiring (would need to drill a nice hole in v-slot to poke wiring directly into controller box), but it leaves little space to pass wiring through and top of V-rail. You might want to make the opening a bit taller ?

    Is there room for doing a triple span X-axis beam ? Would need extra holes there.

    As anyone thought of trying an H beam type configuration for the X-axis ? 20x40 sideways between the 20x60 (or taller for wide spans). The horizontal "spanner" could be fixed to the "beams" with corners (whether 2 or 3 hole brackets or corner like those used at gantry plates every 10" or so, top/bottom). Extra width would be to give a wider base for X-axis wheels which should limit the front/back flex in the Z-axis assembly (maybe ?). There would not be a need for the back X v-slot ...

    How about a triple 20x40 sideways or double 20x60 for the Z-axis itself (instead of a single 20x60) ? It's tad thicker but might limit flex in the Z-axis as tool pushes in work piece ... The plates of Z-axis would need to be redesigned. A single design for all three options should be possible, at least for top plate; bottom plate might need two design (standard and "hefty") not to get in way of router/spindle ...

    Just thoughts as I look at my OX ... Still waiting for time to install electronics ...
     
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  15. Chris Laidlaw

    Chris Laidlaw Well-Known
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    Thanks for the info Serge.
    Hope the electronics installation goes well.
    Chris
     
  16. Franco Ponticelli

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  17. Tweakie

    Tweakie OpenBuilds Team
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  18. PoppyRoseGifts

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    Hi, I'm new here. I bought a OX CNC router kit, after being assured it was easy to build (I'm a crafter, not a builder) & after going through the contents of the box & the instructions forwarded, now I'm concerned Ive made a big mistake & Im out of my depth! although I'm quite a practical person. I wondered if anyone could offer any advice for the best place to start for someone so new to this?
     
  19. Robert Hummel

    Robert Hummel Custom Builder
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    Start with watching the build videos ;)
     
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  20. PoppyRoseGifts

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    Thank you :) I just started watching them
     
  21. Todd Powell

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    Everything is ordered, just waiting for boxes to arrive. Thank you @Chris Laidlaw for stepping up and making parts.

    @kram242 , I'm really looking forward to starting on this project. I sincerely appreciate your hard work and contribution to this community! CNC has been an interest for awhile, nice to finally work on a project.

    Reading all about controls, software etc. while waiting for parts. Setup an old pc with linuxcnc today. Probably give that a try and also trial of Mach3. Looks like the new version of Mach is right around the corner so will probably wait for that.
     
  22. Mark Carew

    Mark Carew OpenBuilds Team
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    @Todd Powell thank you for the kind words my friend, it all in good fun for me :) I enjoy the building aspect but I have to say the best part for me is seeing it come to life for the first time once its complete. DIY CNC's are such great projects and I hope you find it as rewarding as I do especially when you have a great group of friend to share the experiences with :thumbsup:
     
  23. Tweakie

    Tweakie OpenBuilds Team
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    Hi Todd,

    You could be waiting a long time for Mach4 - It has been " just around the corner " for the last 3 years. :)

    I have been doing some testing with Mach4 and the overall smoothness of the motion it produces is just brilliant. However, there are still the inevitable bugs to be found and resolved which is, I think, taking a lot longer than expected.

    This is just a short video of my last test run with Mach4, the Darwin driver and my laser http://www.graytel.talktalk.net/Mach4.wmv

    Tweakie.
     
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  24. greenmonk

    greenmonk New
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    Working on this build and am about to start building the frame. I bought limit switches, but am not sure exactly where to put them, when to add them to the build, and how to wire them. Has anyone built the OX with limit switches?

    I'm part of the build group with Jeff Balderson (see p.28) and I'm supposed to tell him how to do the limit switches when I figure it out. That's why I'm turning to you guys! lol! Can anyone help?

    So far the build is going great!
     
  25. Jestah

    Jestah Well-Known
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    I will take photos of my limits later today when I get home from work....

    For now just a little bit of a teaser .... I did my best to cut the Vslot square with my drop saw but in the end found a bit to much induced stress in the frame when squaring so went all out and milled the critical ends of the vslot. All sticks that needed to be the same length were bolted together and milled as a pair as well. So far it is MUCH closer to being true, not perfect but very close. I am hoping to use duel switches on my slaved axis to resquare the gantry to bang on.

    cutting.jpg
     
  26. Mark Carew

    Mark Carew OpenBuilds Team
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  27. Bmoz

    Bmoz New
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  28. Rob Kent

    Rob Kent New
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    Bmoz,

    I'm the one that asked Chris the question about using NEMA 23's. His response to me was 'I think they may be too heavy' and might slow the speed of the axis travel. What size 23's are you using for the X / Y axis and are you using same for the Z? What are you using for a spindle motor on your build?

    I found some 130 0z-in NEMA 17's that I may consider instead of 287 oz-in NEMA 23's. Your opinion and experience would be of value in my decision making process.

    Rob
     
  29. Bmoz

    Bmoz New
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    I have only been running them for a few days. I haven't done any heavy work with them yet and can't really venture an opinion on how it will go long term. Having said that my OX is all aluminum and is feels steady as a rock with the 23's on the x and y axis. For the z axis I am running a Nema 17 for no other reason than I didn't want to have to re-engineer the plates.
     
  30. Jay_r

    Jay_r New
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    I thought 23's on the x and y were the stock size? I'm running 270 oz/in on the x any y and it zips around just fine at 48v.
     

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