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cnc plasma table

Discussion in 'Other Builds' started by edward siegel, Mar 25, 2015.

  1. openhardwarecoza

    openhardwarecoza Journeyman
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    If you switch to a more "open" toolchain we can add a actuated inductive probe and probe it before each part, similar to how the reprap and PCB CNC guys do - except not in the beginning, but between parts (since the sheet can warp during the job from the heat of cutting)

    Using software compensated Z levelling should keep the cutter head safe - and is pretty much on par with the cheaper THCs . The more expensive ones do it dynamically during the cut, the cheaper ones do it by probing and storing.

    Look at this video:



    In each time where his THC (Torch Height Control) presses the nozzle onto the sheet - at that time in GCode we will do something like:

    G0 Z +40 (lift the torch 40mm off
    M601 S180 (Actuate a servo to lower the inductive probe down - we want it lifted up and out of the way of the heat and sparks most of the time)
    G32 (Probe Z Height and set new Z Zero)
    M601 S0 (Lift probe back up
    G0 Z-40 (Move torch back down)
    ...Continue cut

    Marlin/Repetier already has support for this, just needs a simple post-processor in your GCode toolchain

    Controller: The chinese TB6560 boards are horrible - you already found that out. :)

    I would not mind taking some time and designing a fork of my controller specifically for a plasma machine. Runs with Wantai DQ542MA stepper drivers rather than the crappy TB6560 / 6600, but can also work with Geckodrives...

    Secondly these already support hostless running (LCD +SD Card) which means taking the PC out of the garage which to me is always a good thing
     
    #31 openhardwarecoza, Apr 6, 2015
    Last edited: Apr 6, 2015
  2. edward siegel

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    witch item are you referring to
     
  3. edward siegel

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  4. edward siegel

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    that's the item number that should help you get it
     
  5. edward siegel

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    my gecko and power supply
     

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  6. edward siegel

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    thank you tweakie
     
  7. edward siegel

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    thank you kram242 for the nice review
    thank you openhardwarecoza
    thanks for the compliments :)
     
  8. edward siegel

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  9. edward siegel

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    I ran the roadrunner program on my cnc plasma table its working flawlessly so far omg this is awesome
     
  10. Mark Carew

    Mark Carew OpenBuilds Team
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    Thats awesome news @edward siegel keep up the great work! Excited to see this baby cutting :thumbsup:
     
  11. edward siegel

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    how do I upload a video on here id love some feed back on how she is running at this point
    I love the gecko g540 it makes things so much better
    the only thing at this point is I cant slave a to y in plasma profile only in mill. my slave motor for y axis in plasma mach3 doesn't work they work flawlessly in mill profile. I followed youtube instructions .....im just worried about turning on and off the plasma in mill profile
     
    #41 edward siegel, Apr 14, 2015
    Last edited: Apr 14, 2015
  12. edward siegel

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    first cut lol roadrunner sample lol that comes in mach3
     

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  13. edward siegel

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    I put a marker in torch holder and drew first lol it repeats very close I had to add a ground wire to the torch tip to get it to work
     

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  14. Paruk

    Paruk Journeyman
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    Great News! Now…..the video, Edward.:thumbsup:
     
    edward siegel likes this.
  15. edward siegel

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    I can build a cnc machine from scratch but I'm lost on how to upload a video
     
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  16. Paruk

    Paruk Journeyman
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    Best is to do it through youtube and post a link to that video here. Another one is choosing the "upload a file" option here in the reply box. On youtube is simply a matter of dragging a video that's on your computer onto the box for downloading. It all is fairly simple to do. Try it.:)
     
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  17. Mark Carew

    Mark Carew OpenBuilds Team
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  18. Steve B

    Steve B Well-Known
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    I just purchased the LCTHC from www.candcnc.com for my OB Plasma build. I haven't had a chance to hook it up yet, but I wanted to buy from the US and the price was about the same. I'm planning on using the Planet CNC USB controller with it. All looks good on paper, I'm hoping I don't have interference with USB in close proximity to Plasma. I'll probably switch to Mach if it's troublesome.
     
  19. edward siegel

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    I've been away for a while it feels great to be back
     
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  20. Mark Carew

    Mark Carew OpenBuilds Team
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    Welcome back @edward siegel :thumbsup: I think I speak for everyone when we say we are excited to see the coolness you have been making on your plasma!
     

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