Welcome to Our Community

Some features disabled for guests. Register Today.

Sign Up

Plasma intermittently turning off

Discussion in 'OpenBuilds Forum Help' started by Rhyja, Jun 2, 2021.

Tags:
  1. Rhyja

    Rhyja New
    Builder

    Joined:
    Jan 20, 2021
    Messages:
    17
    Likes Received:
    2
    Hi hopefully someone has an idea that might be going on. I am running a plasma with my blackbox control, the code is written with the open build CAM Gcode creator. My problem is i first noticed that my cuts were ending early and now all of a sudden the torch just turns off while its cutting however the machine is still running through the tool path. I never change any setting or setup, i did a few large monograms and signs, now it wont do a 25 x 25 mm square with 2 small holes it. The attached video explains whats going on i also. i tried to video the code and the torch at the same time

    The only thing that has changed from what i see is that the power supply fan is no longer working. so i'm not sure if that if the problem because things run fine and just stop. any suggestion would be greatly appreciated.
     

    Attached Files:

    #1 Rhyja, Jun 2, 2021
  2. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
    Staff Member Moderator Builder Resident Builder

    Joined:
    Mar 1, 2017
    Messages:
    13,986
    Likes Received:
    4,105
    Power supply fan is temperature controlled

    Extinguishing arc usually accompanies worn out consumables. Regularly replace the torch consumables, and make sure your water traps are working (dry air a must, too much moisture kills consumables quickly)

    Other possible causes:
    - Weather warming up right? Exceeding duty cycle of the plasma inverter it may shut itself off to cool down
    - Incorrect pierce height / cut height
    - If its an HF Arc inverter the two little spark gap pins inside may need adjustment
     
    #2 Peter Van Der Walt, Jun 2, 2021
  3. Rhyja

    Rhyja New
    Builder

    Joined:
    Jan 20, 2021
    Messages:
    17
    Likes Received:
    2
    Thank you I will replace them
     
    #3 Rhyja, Jun 2, 2021
  4. Todd Pace

    Todd Pace New
    Builder

    Joined:
    Feb 28, 2024
    Messages:
    9
    Likes Received:
    1
    peter i have the opposite issue, the torch probes, makes the first cut, but doesn't turn off between separate cuts. any suggestions
     
    #4 Todd Pace, Apr 16, 2024 at 9:50 PM
  5. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
    Staff Member Moderator Builder Resident Builder

    Joined:
    Mar 1, 2017
    Messages:
    13,986
    Likes Received:
    4,105
    Need additional info. What CAM? Sample gcode file? Does tool on/off menu work? Is it a Blowback/LF plasma or a HF (EMI preventing proper functioning)
     
    #5 Peter Van Der Walt, Apr 17, 2024 at 12:30 AM
  6. Todd Pace

    Todd Pace New
    Builder

    Joined:
    Feb 28, 2024
    Messages:
    9
    Likes Received:
    1
    using open builds/fusion360 cam, run through open build control, to black box 32. plasma is cut master 52 with a floating head sensor on z axis. I home the machine then set torch to work zero. torch moves to first cut position, probes appriately, pierces then makes its first cut. I expected torch to shut off after completing first cut but doesn't. it does retract, some while traveling to cut #2 but torch doesn't turn off. at second cut point it probes again with torch burning then make the second cut. is the retraction of the torch after each cut what breaks the arc and turn off the torch? I'll make a new pass and get some code to look at.
     
    #6 Todd Pace, Apr 17, 2024 at 3:51 PM
  7. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
    Staff Member Moderator Builder Resident Builder

    Joined:
    Mar 1, 2017
    Messages:
    13,986
    Likes Received:
    4,105
    Don't forget to post

    No, the M5 in the GCODE should

    Which is why we asked

     
    #7 Peter Van Der Walt, Apr 17, 2024 at 3:55 PM

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Accept Learn More...
    Dismiss Notice