Plasma Build

This topic contains 13 replies, has 10 voices, and was last updated by  Chris 4 weeks ago.

Viewing 14 posts - 1 through 14 (of 14 total)
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  • #30714

    Truk
    Participant

    I built a MPCNC plasma cutter. It went together really well and if I did run into a problem the forums had a solution. I built it for a class in school for genius hour.

    Here is a video of it running.

    Thank you for designing the CNC.

    2 users thanked author for this post.
    #30716

    Ryan
    Keymaster

    Dude, High five!

    You need to give us some details, super stoked to see this and I have been itching to build one myself.

    #30743

    Anonymous

    Yes… I would like to know more about how your plasma cutter and how your triggering it.

    #30783

    Rand
    Participant

    I want to set up my MPCNC to run a 2D pattern from a sketch I would draw. Doll house parts. Can any one suggest a simple drawing program, a program to create the g code, and how to use repetier to run my MPCNC. How do I disconnect the temperature requirements for the extruded? How do I change the code to control the router off and
    on? Do I reload this to the Arduino? Will the 3D aspects of the software make it difficult?
    Any help would be appreciated.
    Rand

    #30784

    Jeffeb3
    Participant

    @Rand, check out the vicious1 tutorials. If that’s​ not enough info, maybe make a topic of your own.

    #31014

    Truk
    Participant

    I used Estlcam
    go to setup at the top
    CNC Programs/Texts/Laser,plasma,water jet etc.
    Start Cut
    M106 (Close relay on D9)
    g4 s0.7
    End Cut
    M107 Open relais on D9
    I used 12V dc coil relay on D9 to switch torch.

    Amazon link
    https://www.amazon.com/gp/product/B017LB4AZ6/ref=oh_aui_detailpage_o09_s00?ie=UTF8&psc=1

    

    #31018

    Dui, ni shuo de dui
    Participant

    Why am I the only loser who cannot make it work?….

    I really need to give it a try again… XD

    #35426

    sempul
    Participant

    what files did you use for the printed parts?

    #66501

    SQLException
    Participant

    I used Estlcam
    go to setup at the top
    CNC Programs/Texts/Laser,plasma,water jet etc.
    Start Cut
    M106 (Close relay on D9)
    g4 s0.7
    End Cut
    M107 Open relais on D9

    Old topic, I know.

    Just tried to switch a relay (for Plasma torch) with these settings. According to estlcam.de (https://www.estlcam.de/steuerung_cnc_programme.php) M106, M107 and G04 are not even supported. So I have my doubts this worked for that guy. I’m using Ramps 1.4 with EstlCAM 10 (the last version that supports Ramps).

    To me it looks you can’t switch anything at all with this config (Ramps + EstlCAM). There is not a single Output available with Ramps. Even if the guy above didn’t use a Ramps, the G-Code in question isn’t supported in EstlCAM anyway.

    View post on imgur.com

    Can anyone verify this?

    #66518

    Ryan
    Keymaster

    Estlcam to make the Gcode, not estlcam control software, the way most of us use it. Marlin supports those commands.

    1 user thanked author for this post.
    #66546

    SQLException
    Participant

    Yeah thats really what just came to my mind, too. So easy. Thanks!

    #75171

    Chris
    Participant

    Just trying to get my head wrapped around using a plasma cutter as a tool.

    I’ve had a Miller Spectrum 125C for a bunch of years and never really liked it as a tool. It was difficult to use because it’s such a low power unit. Although, a CNC machine could easily maintain the delicate speed balance needed to make a good cut.

    When I look at some of the other DIY builds out there, this seems to be a popular component to maintain the control of the torch:

    http://proma-elektronika.com/index.php/en/products/thc-torch-height-control/compact-thc-150

    Is this something that could be incorporated into the MPCNC platform? Is it overkill? Or maybe I’m just not understanding several things……  🙂

    Thanks

     

    #75190

    Bryan
    Participant

    I’ve had a Miller Spectrum 125C for a bunch of years and never really liked it as a tool. It was difficult to use because it’s such a low power unit.

    That unit is definitely on the low end. It’s a pilot arc start which is good, but it may run into issues overheating on long cuts. The duty cycle is only 35% at max output, which is rated for 1/8″. Even if you did 14ga or thinner, it’s probably going to take all that that machine can offer and you will have to go slow. While it’s easy to try it out, I would recommend a 45A cutter at a minimum, to ensure that you can achieve 100% duty cycle while cutting thin sheets.

    When I look at some of the other DIY builds out there, this seems to be a popular component to maintain the control of the torch:

    http://proma-elektronika.com/index.php/en/products/thc-torch-height-control/compact-thc-150

    Is this something that could be incorporated into the MPCNC platform? Is it overkill? Or maybe I’m just not understanding several things…… 🙂

    Yes, a THC is vital to controlling cut quality, especially on thin sheets. The material will warp as it heats up and be outside the ideal cutting distance ~0.060″ for 14 ga and similar. The Proma THC is a popular solution for an external THC. It can be attached to anything because it handles the Z movement independent of the rest of the controller because it can generate its own step/dir commands.

    This is the one that generates step/dir pulses which can be used with DRV8825 drivers. http://proma-elektronika.com/index.php/en/products/thc-torch-height-control/compact-thc-sd

    #75274

    Chris
    Participant

    Thanks Bryan, I appreciate the information, it’s helpful.

    Every time I look at the 125C, I think about selling it, but now it can at least be a place to start and accomplish basic functionality on the CNC.  The THC component you recommended seems like an easier implementation.

    So are the DRV8825 drivers native to the Rambo & mini-Rambo? Is there a way to wire the THC directly into the board? Or will it require 1 extra driver? So take Rambo step/dir output to the THC, then THC step/dir to another DRV8825, then to the Z-axis motor?

    Obviously, I’m not the best with electronics. I can follow instructions, but don’t understand much about the components themselves.
    Many thanks
    Chris

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