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Silverchris's Laser Cutter

Discussion in 'Laser Cutters' started by silverchris, Mar 16, 2018.

  1. silverchris

    silverchris Well-Known
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  2. silverchris

    silverchris Well-Known
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    This is my first attempt at designing using v-slot or t-slot, so any feedback on my design would be appreciated. In my head it seems like it should be sturdy, and functional for a frame?
     
  3. Mark Carew

    Mark Carew OpenBuilds Team
    Staff Member Moderator Resident Builder Project Maker Builder

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    Looks great man, love the idea of the corexy for this system.
    I would make a suggestion to make sure you enclose this system to be safe.
    Keep up the the great work!
     
  4. silverchris

    silverchris Well-Known
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    Thanks Mark, a sealed enclosure is planned :)
    My current thoughts on the process is get the movement figured out, and get the optics and electronics all functional, and then get the laser tube as well as enclose it.
    I updated the picture on the build page, as well as included a link to the sketchup 3d warehouse of the WIP 3d model.
     
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  5. pedrofernandez

    pedrofernandez Veteran
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    Question? is this a two motors running the y axis or the x?
     
  6. silverchris

    silverchris Well-Known
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    Both :)
    I am using a corexy design, which uses two motors and belts tied to the Y gantry, that when coordinated move both the X and Y with the two motors.
    The corexy site has a good overview CoreXY | Cartesian Motion Platform
     
  7. silverchris

    silverchris Well-Known
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    Some progress has been made, though I am having some issues.
    I managed to get the frame assembled, though I am having a little bit of an issue with the X gantry having what feels like a lot of wobble/wiggle in it. E.G. when I grab one side of it, I can pull it back a little bit, or pull it forward before the other side starts to move.
    I have a feeling that it comes from my frame not being perfectly straight, so this week, I think I am going to pull it apart, and check the squareness of the cuts on the ends of the t slot/v slot, and double check the lengths are all the same.

    Also, this photo clearly shows that I need more shop space :)
    [​IMG]
     
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  8. pedrofernandez

    pedrofernandez Veteran
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    What a great idea, im still wondering a miss step of a motor and safety, if a miss align of mirrors occurs ??
     
  9. silverchris

    silverchris Well-Known
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    I have found a few examples of people using the core X-Y design. A slipped belt would just result in the cut being off, as the mirrors have to be in alignment across the whole table, the only way the beam would miss the laser head is if one of the mirrors was misaligned on the mount
     
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  10. pedrofernandez

    pedrofernandez Veteran
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    For the size of what your are looking for, 20x20 have a lot of flex but, im also new to this so maybe a bigger profile will help to keep the motion system more strong, keep on going
     
  11. pedrofernandez

    pedrofernandez Veteran
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    or build the x y stages inside the frame with 20x60s , easy to hook it up with the frame, you will need strong support for a big fast moving machine.
     
  12. silverchris

    silverchris Well-Known
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    I should have taken a video of the the wobble, but I think it's a bit excessive to be the flexibility of the 20x20, it might be a few centimeters each way, and the 20x20 doesn't feel like it would flex that much in the hand. I think the mini-v wheels aren't being allowed to sit flat in the v slot, letting them have a lot more side to side play in the v slot than they should? I will have to do some playing tomorrow, as I didn't really check if the amount of play changed when I rolled it along to a different part.
     
  13. pedrofernandez

    pedrofernandez Veteran
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    i should try modifying a bit your idea and build your motion system independent but attachable to the machine frame,
     
  14. JustinTime

    JustinTime Master
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    I think that before you start pulling it apart try screwing the frame to the table and installing some plates on the corners. You'll need about 20 of them and they will stiffen up the frame immensely.
     

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