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OpenBuilds OX CNC Machine

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

  1. bobt

    bobt Well-Known
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    Guys - You can solve the problem just like industry does. Use a "flech" beam. Sandwich a 1/8" steel plate between the 2 80x20 parts and the whole thing will have the support of an equivalent steel beam. Carpenters do it all the time with 2 - 2x12 and a 1/4" steel plate. Bolted together tight. Not a big deal. And a lot cheaper.

    Please notice that I am still looking for the stupid box. Either it is so big I have never found it or so small that I have overlooked it.

    Bob
     
  2. Nick Lancaster

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    That is what I am planning for my build(s) Bobt.

    But even that will not allow the openbuilds v-slot derived machines to cary that monster rouer motor. It would be just to **** heavy.
     
  3. bobt

    bobt Well-Known
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    Why not with 17 wheels on the top and 17 on the bottom that should support 85 pounds of weight. I should not weight more than that. I just love the idea of that many wheels. It reminds me of a choo-choo train. You just have to look at it right. Wait we are talking routers here not trains. Sorry.

    Bob
     
  4. Mark Carew

    Mark Carew OpenBuilds Team
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    I like this idea of a C channel with the double extrusions. However in what experience I have of building cnc machines I would say he is right on the verge of needing an all steel machine for this size/weight.

    Capture.JPG


    In a case like this you may be able to use OpenRail mounted directly to a steel square tube.
    But even still delrin wheels, so you could switch to the steel V wheels and go with a steel rail
    like this http://www.mcmaster.com/#v-groove-tracks/=q4vgyp

    $(KGrHqJ,!r!FJTINR!rRBSctPIi6-!~~60_35.jpg DSC00193__75464.1379562242.400.310.JPG
     
  5. Nick Lancaster

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    One reinforcement I can think of would be to fill the very large voids of the v-slot extrusion with Epoxy Granite. This is just like the synthetic granite counter tops, and also used in very large machines to stiffen them and give them more mass in certain locations.
     
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  6. Mopar32985

    Mopar32985 Well-Known
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    Some good conversation going on here I was also looking the Bosh. Also Mark you have outdone yourself. I just got in the parts to build the OX minus the plates. Wow everything is so nice and seems to be very high quality. Even the packing is great. I am super pumped to get this build going.
     
  7. Mark Carew

    Mark Carew OpenBuilds Team
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    Thanks @Mopar32985 I be sure to relay to the team, they will be happy!

    :) Indeed
     
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  8. Nick Lancaster

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    The added mass would be good for the base of the machine. Not for the gantry.
     
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  9. Mopar32985

    Mopar32985 Well-Known
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    So what cnc control software are you guys using. This will be my first cnc build. Im guessing Mach3. If not what others are out there
     
  10. Nick Lancaster

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    I am going to try LinuxCNC first, but mach3 is what I have on my big router.
     
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  11. Mopar32985

    Mopar32985 Well-Known
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    I would love to get into linux but command prompt scares me haha
     
  12. Nick Lancaster

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    From what I can tell nearly no command prompt needed to run LinuxCNC.
     
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  13. Nick Lancaster

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    intial setup seems to require running a few commands form the command line. but day to day use is all GUI.
     
  14. Mark Carew

    Mark Carew OpenBuilds Team
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  15. Nick Lancaster

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    GUI is wonderful!
     
  16. Mopar32985

    Mopar32985 Well-Known
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  17. Mark Carew

    Mark Carew OpenBuilds Team
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    That's going to be great, I have not messed with the Pi yet so I am looking forward to this.
     
  18. The Dude

    The Dude Well-Known
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    what about sandwiching wood between 2 20x80 beams? That should support 7 or 8 lbs. Like a 2x4 or something cheap.
     
  19. Mark Carew

    Mark Carew OpenBuilds Team
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    Hey guys a little update just received a few parts I was waiting for, mainly GT3 pulleys. I want to try this beefy belt for the nema23 runs and see how well it works :). I am also working to source 5mm wide belt to elevate any track rubbing while using belt & pinion, well see how it works. I could always go with acme lead on the outside if it does not work out or rack and pinion, but I would much rather stick with the belt, its just so easy to setup and this is how I am going to complete this build for testing. I have also started to film Part 2 of the build now that I have the parts in house. So we will complete the belts install as well as the wiring and the software at that point we should be good to go. We are also working on the parts that are not on the list yet and will update as we complete them.
    Thanks for all the interest and excitement it really helps to fuel the fire :)
     
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  20. Mopar32985

    Mopar32985 Well-Known
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    Sounds great Mark. Just received more parts today. Very excited to see part 2 of the video series. Also can't wait to hear more about the plates for the OX.
     
  21. Mark Carew

    Mark Carew OpenBuilds Team
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    Thanks for your support @Mopar32985 We will do our best to keep updated. We have been busy making the videos so at this point we are on wiring then on to software and edit it all down to post :)
     
  22. Bryant

    Bryant New
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    Mark,

    What is the z axis travel distance on the ox and routy?
     
  23. Robert Hummel

    Robert Hummel Custom Builder
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    Man! the black OX looks sweet

    Im so building 1 for milling PCB and HDPE
    Time to bust out the 890KV Outrunner ;)
     
  24. Robert Hummel

    Robert Hummel Custom Builder
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    very cool idea
    I have bin looking into a way to display the g-code being sent to GRBL on to a LCD
    I was thinking there may be a way to in a sence snoop on the rx and tx lines and have a serial lcd disdply it.
    Im sure there is a way as its done with other serial displays, just a matter of looking in the right places lol
     
  25. Mark Carew

    Mark Carew OpenBuilds Team
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    if anyone can figure this out I am sure you can Robert :) I will keep my eyes open for anything that may help.
    I agree the Black OX does look cool!
     
  26. Mark Carew

    Mark Carew OpenBuilds Team
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    Its about 2.75+" 70mm
     
  27. The Dude

    The Dude Well-Known
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    What does an 890kV outrunner cost? Are the shafts pretty much all 8mm? Nevermind that's what we've been discussing all along, hehe. I think it would be fun to build a head for the OX that can do CNC, pick+place, 3D printing, and laser...
     
    #117 The Dude, Jan 11, 2014
    Last edited: Jan 11, 2014
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  28. Gopal

    Gopal New
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    I have been playing with Synthetos TinyG board which has the GRBL embedded and 4axes motor driver (mapped to 6axes). For the GUI, the tgFX is the basic software I use - keeping everything open! There is also a GRBL shield for the Arduino.
     
  29. Mark Carew

    Mark Carew OpenBuilds Team
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    I have been wanting to try out the tinyG board looks really nice and I like that you can map the motors. At the moment I am using the GRBL shield /gcode controller (all open as well :) ) but I think we will find that we will need more power for these NEMA 23's we will see how it works out.
     
  30. Gopal

    Gopal New
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    Indeed the motor current tops out at 3A on the TinyG which is a shame.
    The tgFX is also in the development stages and is a little buggy. I am looking at loading GRBL onto an UNO or the DUE and see if I can get the Gcode onto a SD card.
    The other possibility is to interface it to an iPAD which would be awsome.

    My interest (as a newly retired person -am 68yrs) is doing some 3D photo carving and the OX is perfect for that. (I may need a little more than 70mm Z travel but that's the beauty of your design - it can be modified. Thanks for all your contributions.
     
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