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Step by step instructions on creating GRBL to surface spoiler board??

Discussion in 'CNC Mills/Routers' started by iH8vols, Oct 28, 2017.

  1. iH8vols

    iH8vols Well-Known
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    I build an ox. My frustration with the build is there are no step by step Instructions on how to do anything. I spend hours figuring out one problem then I get ready for the next one but rather than having clear directions I have to google endlessly hoping there’s some obscure video somebody made on dim lights in the basement or closet of their house.

    I have vcarve pro. I have a 47” x 22” surface. I want to take off about .005” of material to smooth the surface. I can’t find anything that shows me how to do this. How do I create the toll paths to do this?? I YouTube videos and somehow can only find videos of guys filming the cnc going back and forth on the board for 15 mins but nothing on how to generate the gcode. I’ve tried several random programs that people have made but I can’t get anything to work in universal gcode sender.

    I am ssooooooo frustrated right now. I feel like I throw away hours and hours of my week trying to get this thing to work and every week ends with failure and no close to having a machine that can draw a basic little circle. Current it draws a circle that’s 5mm short of closing. I posted last week and someone said i needed to surface my board before it could be diagnosed. Get up today ready to go and I can’t get anything to work.

    Sorry for the rant. I’m just livid today and so incredibly close to throwing this whole machine away and forgeting the whole idea.
     
  2. Kevon Ritter

    Kevon Ritter Veteran
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    What CAD/CAM are you using?

    I use SketchUp for planing. Just make a square the size of your spoiler and create a pocket operation. It's that simple. Set the pocket to 100% depth and control depth by material thickness.
     
    David the swarfer likes this.
  3. iH8vols

    iH8vols Well-Known
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    I’ve been using Vcarve Pro and sending it thru UGS.
     
  4. Kevon Ritter

    Kevon Ritter Veteran
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    check my edit. The same idea should apply. I was never a fan of Vetric so I can't directly help you there.
     
  5. iH8vols

    iH8vols Well-Known
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    Ok. Thank you. I appreciate it. I’ll give it a try. I hate getting this frustrated. Usually i can figure stuff like this out. Any thoughts on my circle issue? Here’s a pic

    Thanks again. Really do appreciate it.
     

    Attached Files:

  6. Kevon Ritter

    Kevon Ritter Veteran
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    What parameters did you use to create that? What machine do you even have?
     
  7. iH8vols

    iH8vols Well-Known
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    I built the Ox model.

    Here's the code I used to make the circle:

    T1M6
    G17
    G20
    G0 Z0.8000
    G0 X0.0000 Y0.0000 S16000 M3
    G0 X-1.2778 Y-3.2228 Z0.2000
    G1 Z-0.0010 F30.0
    G2 X-3.2778 Y-5.2228 I-2.0000 J0.0000 F50.0
    G2 X-5.2778 Y-3.2228 I0.0000 J2.0000
    G2 X-3.2778 Y-1.2228 I2.0000 J0.0000
    G2 X-1.2778 Y-3.2228 I0.0000 J-2.0000
    G0 Z0.2000
    G0 Z0.8000
    G0 X0.0000 Y0.0000
    M30




    These are my GRBL Setting:

    $0=10 (step pulse, usec)
    $1=255 (step idle delay, msec)
    $2=0 (step port invert mask:00000000)
    $3=2 (dir port invert mask:00000010)
    $4=1 (step enable invert, bool)
    $5=0 (limit pins invert, bool)
    $6=0 (probe pin invert, bool)
    $10=3 (status report mask:00000011)
    $11=0.020 (junction deviation, mm)
    $12=0.002 (arc tolerance, mm)
    $13=0 (report inches, bool)
    $20=0 (soft limits, bool)
    $21=0 (hard limits, bool)
    $22=1 (homing cycle, bool)
    $23=0 (homing dir invert mask:00000000)
    $24=500.000 (homing feed, mm/min)
    $25=3000.000 (homing seek, mm/min)
    $26=244 (homing debounce, msec)
    $27=5.000 (homing pull-off, mm)
    $100=27.000 (x, step/mm)
    $101=26.634 (y, step/mm)
    $102=202.000 (z, step/mm)
    $110=4000.000 (x max rate, mm/min)
    $111=3000.000 (y max rate, mm/min)
    $112=1000.000 (z max rate, mm/min)
    $120=2000.000 (x accel, mm/sec^2)
    $121=2000.000 (y accel, mm/sec^2)
    $122=1000.000 (z accel, mm/sec^2)
    $130=1190.000 (x max travel, mm)
    $131=569.220 (y max travel, mm)
    $132=1000.000 (z max travel, mm)
     
  8. Kevon Ritter

    Kevon Ritter Veteran
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    Nothing seems out of place there, aside from $132, which has nothing to do with this.

    What motors?
    What microstepping?
    What current?
    What drivers?
     
  9. iH8vols

    iH8vols Well-Known
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    yea, the $132 is normally at 100, but i turned it "off" by putting it there so I could calibrate it.

    I'm using Openbuild's Nema 23's.
    I'm at 8 ustep/step.
    I have the current turned up to 1/4 on the dial. I'll attach a photo. My power supply is: 24V DC 14.6A 350W
    I'm using the xPro V3.





    IMG_3126[1].JPG
     
    #9 iH8vols, Oct 28, 2017
    Last edited: Oct 28, 2017
  10. David the swarfer

    David the swarfer OpenBuilds Team
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    circle not closing = backlash
    prove it by programming the circle in the other direction, the gap will swap sides.

    looks like X is the problem, but it coudl be Z twisting.
    make sure the belt is tight enough.
    make sure the wheels are set correctly (X and Y and Z). (watch the videos)
    make sure the set screws on the toothed pulley are tightened properly and the pulley is not slipping.
     
    Joe Santarsiero and Kevon Ritter like this.

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