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OpenBuilds OX CNC Machine

Discussion in 'CNC Mills/Routers' started by kram242, Dec 15, 2013.

  1. Robb

    Robb New Builder

    I just built my big ox, trying to run my first gcode, looks good in air printing. I am trying to find a calibration file to use. I have a tinyg controller and am just using foam (so I don't screw it up too bad). Any suggestions? I'm also interested in Grandpaw B's issue as I have Cut-2d & 3d as well as photo-v-carve and don't know what post processor to use with my system. I am trying to get good enough to run a couple photos for my brother in the next 2 weeks before I visit.
  2. bobt

    bobt Journeyman Builder

  3. Robb

    Robb New Builder

    Thanks Bob, I was running that file and see that the cheap foam insulation board isn't always level. I May tramm my bed to address that, but we will see. It's only been one evening.
  4. GrandpawB

    GrandpawB Journeyman Builder

    Hers's what I found out:
    Mach 2/3 Arcs, is what you would use for normal cutting jobs.
    Mach 2/3 ATC Arcs, is for when your machine utilizes an Automatic Tool Changer. (ATC)
    Mach 2/3 wrapx2a, is for rotary work where you are wrapping the X axis around your A axis.
    This is dependant on how your rotary axis is set up. You may need to use Mach 2/3 wrapy2a instead.
  5. SlyClockWerkz

    SlyClockWerkz Journeyman Builder

    My 1500x1000 ox is starting to take shape. The main structure is put together. After moving the gantry around a bit, I founds its pretty easy for the gantry to start 'wiggling/racking' back and forth when moving the gantry back and forth quickly. This has me slightly concerned at the moment, but I imagine that's why a dual y motor setup is recommended.
  6. Robert Hummel

    Robert Hummel Custom Builder Staff Member Builder

    You will see a big diff once the spoil board is in and mounted.
    Still waiting on my last driver to show up.
    The first 3 came fast but the forth I guess took the long way :/
    I'm at a stand still but all assembled :)
    Mine is 1250 x 900
    kram242 likes this.
  7. BinaryConstruct

    BinaryConstruct Well-Known Builder

    I just finished getting my first aluminum piece cut and I thought I would share some of my equipment and settings, trial and many errors later. Most of the early on problems I had were related to getting aluminum gummed in the mill. Slower RPM and faster feed rate helped. I cannot overstate how much a shop vac or compressed air to blow away chips helps. Attached photo shows the success and failures.

    firstcut.jpg

    I'm using a Bosch Colt Router spindle: speed 1 (minimum)
    PreciseBits collet kit for Colt Router, for 1/8" bit (PB-BOPG-COLT-84KIT)
    End mill: 1/8" 3 Flute carbide ZrN coated (Maritool)

    CAD/CAM: Autocad Fusion/CAM 360
    Cut depth per pass: 0.5mm
    Feedrate: 500mm/min
    BTW, I accidentally used this high feed rate. Originally I was going much slower, but faster seems to work better.

    Grbl Shield v5/Arduino UNO
    Grbl 0.9 - https://github.com/grbl/grbl/tree/dev

    $0=26.670 (x, step/mm)
    $1=26.670 (y, step/mm)
    $2=50.000 (z, step/mm)
    $3=500.000 (x max rate, mm/min)
    $4=500.000 (y max rate, mm/min)
    $5=500.000 (z max rate, mm/min)
    $6=10.000 (x accel, mm/sec^2)
    $7=10.000 (y accel, mm/sec^2)
    $8=10.000 (z accel, mm/sec^2)
    $9=200.000 (x max travel, mm)
    $10=200.000 (y max travel, mm)
    $11=80.000 (z max travel, mm)
    $12=10 (step pulse, usec)
    $13=0 (step port invert mask:00000000)
    $14=0 (dir port invert mask:00000000)
    $15=25 (step idle delay, msec)
    $16=0.020 (junction deviation, mm)
    $17=0.002 (arc tolerance, mm)
    $18=3 (n-decimals, int)
    $19=0 (report inches, bool)
    $20=1 (auto start, bool)
    $21=0 (invert step enable, bool)
    $22=0 (invert limit pins, bool)
    $23=0 (soft limits, bool)
    $24=0 (hard limits, bool)
    $25=0 (homing cycle, bool)
    $26=224 (homing dir invert mask:11100000)
    $27=25.000 (homing feed, mm/min)
    $28=500.000 (homing seek, mm/min)
    $29=250 (homing debounce, msec)
    $30=1.000 (homing pull-off, mm)
    Last edited: Jun 8, 2014
  8. Pbmaster11

    Pbmaster11 New Builder

    I do not have access to a CNC to cut the parts. does anyone have any good ideas? Can I buy them? pay someone to cut them for me?
  9. mw.design

    mw.design New Builder


    You can buy the OX Plates from EBAY
  10. Bmoz

    Bmoz Well-Known Builder

    Does anyone have a drawing of a mount for the Bosch colt router that doesn't use hose clamps? Heck as long as I am wishing, how about one with a dust collection fitting.
  11. BinaryConstruct

    BinaryConstruct Well-Known Builder

    I went with the hose clamp version, but a quick search resulted in these:
    https://www.inventables.com/technologies/bosch-colt-spindle-mount
    "It has a place to mount an adjustable dust skirt"

    http://k2cnc.3dcartstores.com/Bosch-Colt-Router-Mount_p_11.html

    You could get ideas from them if you wish to make your own.
    Bmoz likes this.
  12. GrandpawB

    GrandpawB Journeyman Builder

    Well, here's what I designed in VCarve Pro Grandpaw sign.JPG and here's what I'm getting on wood IMG_5673.JPG IMG_5674.JPG IMG_5675.JPG I'm getting gaps and overlaps. I've tried different post processors, I've checked to make sure the machine isn't sticking or hanging up. Still poor results. And I noticed it carves deeper on one side of the sign than the other. Any ideas out there?
  13. brjig

    brjig Well-Known Builder

    maybe your running the machine faster than it can cut?
    Its skipping on the right side, so something is getting stuck when it gets there. Is there sufficient room for the machine to move on the right?

    What tool are you using? Your GR is thinner than your PAW

    Thats it, were gonna figure this out,
    Send me the vectric file, let me open it and look at it, maybe something there will give me an idea, because its either the program or the machine.

    Lets start eliminating this one at a time, send me the file and ill test it on my machine and see if I get any issues.
    kram242 and Robert Hummel like this.
  14. GrandpawB

    GrandpawB Journeyman Builder

    Attached Files:

  15. brjig

    brjig Well-Known Builder

    Can you give me the actual aspire vcarve file. I want to see how it plays out there and create a gcode from that file myself.
    Please and thanks
  16. brjig

    brjig Well-Known Builder

    Also that image, does not look like it was done with a vbit. What wood are you using?
  17. GrandpawB

    GrandpawB Journeyman Builder

    I re checked that the machine has plenty of free movement. It does. However, I did notice I lost both of the set screws for the X axis pulley. Luckily, I had extras and replaced them. Maybe that was the problem. I'll try cutting a new sign tomorrow.
  18. GrayUK

    GrayUK Veteran Builder

    Sounds like you might have taken "the spanner out of the works" there.
    Play on an old colloquial English saying.

    Gray
    Robert Hummel likes this.
  19. GrandpawB

    GrandpawB Journeyman Builder

    Sorry, I'm not sure I understand what your asking for. I thought I did send you the actual VCarve file.
  20. GrandpawB

    GrandpawB Journeyman Builder

    ????
  21. GrayUK

    GrayUK Veteran Builder

    If it goes wrong or you mess it up, "You've dropped a spanner in the works". ie. Jammed it or broke it! :banghead:
    That replaces all the equivalent bad words. LOL. :ROFL:

    Gray
  22. brjig

    brjig Well-Known Builder

    in vcarve, instead of exporting out the gcode, save the file instead. File > Save method.
    It may have been your set screw that was missing.
    I had this problem before, too, where everything was going great, but at one part it always messed up, I saw that the set screw holding the gear to the motor was gone and it was slipping at that spot, put in a new set screw and the problem went away.

    Because seeing that slippage on the right side, looked like it was skipping somewhere.

    On to something else.
    I opened up both files

    And there was something odd happening. It wasnt matching up.

    which file did you actually use in Mach? Grandpaws Sign or V-Carve 1-tp?
  23. Tweakie

    Tweakie OpenBuilds Team Staff Member Builder

    Could be that your work table is not level (i.e. it is not parallel with your X axis and / or your Y axis movement). One way of correcting for this is to fit a 'spoil board' to your work table then use the machine to 'surface' the 'spoil board' - you will then have a level work surface for you VCarving, the depth of cut will be equal at both ends of the work and hopefully it will prevent the skipping (motor stalling) that you are getting.
    Alternately, could be that your Velocity's and Acceleration's are set too high and this is causing your motors to skip steps - perhaps a bit of experimentation is needed to identify the problem ?

    Tweakie.
    Last edited: Jun 11, 2014
    Jestah likes this.
  24. GrandpawB

    GrandpawB Journeyman Builder

    Thank you. That took care of one of my problems.
  25. GrandpawB

    GrandpawB Journeyman Builder

    Problems solved. Table (spoil board) was not level and I was missing both set screws from the X axis pulley. I re cut the sign and it came out much better. But wow, all the dust!:jawdrop:
    Robert Hummel likes this.
  26. GrayUK

    GrayUK Veteran Builder

    Breath shallow my friend, breath shallow.

    Gray
    Pbmaster11 likes this.
  27. Robert Hummel

    Robert Hummel Custom Builder Staff Member Builder

    Shop vac is a must and if milling MDF I would suggest a face mask
    Jestah likes this.
  28. GrandpawB

    GrandpawB Journeyman Builder

  29. GrandpawB

    GrandpawB Journeyman Builder

    Has anyone built a hood or enclosure for their OX? I'm playing with the idea.
  30. kram242

    kram242 OpenBuilds Team Staff Member Builder

    Serge E. likes this.

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