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Vcarve Pro vs Openbuilds interface datum issue

Discussion in 'CNC Mills/Routers' started by Cosmic Countertops, Aug 11, 2024.

  1. Cosmic Countertops

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    Hello,

    I recently assembled my lead 1515, and am trying some test cuts. My project isn't starting in the right place, and not sure what the issue is. Have the datum set at bottom left in vcarve, and all looks well in the interface. But when I start the job, it starts at the opposite end of the board. Anyone know what I'm doing wrong? Have attached some photos
     

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  2. Cosmic Countertops

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    I also tried using the center datum in vcarves, and setting my zero point on the machine, on the center of the board. Still having the same issue. The attached photos show where the job is starting. Super stumped here, any help appreciated :/
     

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  3. Giarc

    Giarc OpenBuilds Team
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    Does it start in the back and run in reverse?

    When you jog the machine in the Y positive direction, does it move away from you? When you jog in the X positive, does it move to the right? There is a chance you have your Axis reversed.

    Have you cut a simple "non-Vcarve" projects that have worked?

    Did you home your machine prior to starting your project?

    Are you using the OpenBuilds Grbl post processor for Vectric? docs:software:vectric [OpenBuilds Documentation]
     
  4. Cosmic Countertops

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    When I stand in front of the machine, where it homes too, and do Y positive, X positive, and Z positive/negative, they move in the correct decisions. Have re-homed and redone my zero points, both with the probe and manual. Have spent hours trying to figure this out, just can't seem to figure it out.

    I was having issues posting form vcarve to openbuilds, then figured out the post processor step, and worked fine. Except for it starting at this point.

    It starts running from where I have it started in vcarve, but then moves in the y negative direction, as though I'd need to slide that board past the front of the machine for it to work. So I moved the board to the back of the machine, set my zero points there, still didn't work. Just stumped now, wondering if anyone knows of what little simple step I'm missing lol.
     
    #4 Cosmic Countertops, Aug 12, 2024
    Last edited: Aug 12, 2024
  5. Cosmic Countertops

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    Here's another picture of what's going on. The red is the X axis, blue is Y. When I stand in that position related to the machine, X positive sends it to the left, Y positive sends it away from me. The yellow is where I have it zeroed, it starts at beginning of the text in the file, but then moves towards me.
     

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  6. Giarc

    Giarc OpenBuilds Team
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    So it homes to the front of the machine, not the rear right like industry standard?

    Your X is definitely reversed. You can go into the GRBL settings and reverse the direction. It is the $3 setting.
     
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  7. Cosmic Countertops

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    Correct, homes to the front of the machine. I'll be back at my shop tomorrow and will try that setting reversal and keep you updated. Thanks!
     
  8. Cosmic Countertops

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    So does that mean it should be parking at the other end of the machine, back on the end where my 2 Y motors are located? Or does it park up front, but on the left corner instead of the right corner where it currently homes to?
     
  9. Christian James

    Christian James Journeyman
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    Normal homing is back and to the right
     
  10. Misterg

    Misterg Veteran
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    Homing is separate from getting the axis directions right.

    You can set it to home where you like, but you need to get the axes going in the correct direction first and then adjust the homing settings (they will need to be changed to keep the same home location once the axis direction has been corrected).
     
  11. Alex Chambers

    Alex Chambers Master
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    As @Giarc and @Misterg said.
    You do need to set the workplace coordinate system zero (set XYZ) in the same place on your workpiece as you set the origin in Vectric, but do bear in mind that the toolpath will not necessarily start where you set the origin.

    Alex.
     
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  12. Cosmic Countertops

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    Yes, that definitely makes sense. Hoping that reversing the X axis in grbl control will make that workplace coordinate zero on the machine, the same as it is in vcarve. Thanks for the info everyone!
     
  13. Cosmic Countertops

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    Thanks everyone. I reset the X axis direction in gerbl settings, and that solved it. I'll get it reassembled to the correct layout when I get a but of time. Appreciate the help!
     
    Alex Chambers and Giarc like this.

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