Problem input pins changing status randomly


Results 1 to 9 of 9

Thread: input pins changing status randomly

  1. #1
    Registered
    Join Date
    Jul 2010
    Location
    uSA
    Posts
    14
    Downloads
    0
    Uploads
    0

    Default input pins changing status randomly

    I have a homemade machine using Mach3 and an old XP with a parallel cable. The first thing I noticed was my auto zero touch off pad didn't make a connection to stop the downward Z travel. Then I noticed my Ref All didn't move when pressed. Upon investigation, the machine coordinates reset to 0,0,0 without the gantries moving. Next I hooked up a laptop I use on my metal minimill and it did the same thing. Also, it kept changing the input signals as to high/low settings. I'd fix it so the reset button would be happy, then random settings would turn yellow and it would change on me. So I went back to the XP and noticed that none of the limit switches activated at all anytime. So I opened up my control box to see if anything was amiss. I do have 36vdc and all the wires seemed tight. I sounds like a stray signal or power supply wavering, but I don't know where else to check. The breakout board is lit, but maybe it is dying. What should I replace or check next? It actually ran part of a 1+ hour program without faulter, but then suddenly quit.

    Similar Threads:


  2. #2
    Member ger21's Avatar
    Join Date
    Mar 2003
    Location
    Shelby Township
    Posts
    35538
    Downloads
    1
    Uploads
    0

    Default Re: input pins changing status randomly

    The only thing I know of that would cause Mach3 settings to randomly change would be a pirated Mach3 license file.

    Gerry

    UCCNC 2017 Screenset
    [URL]http://www.thecncwoodworker.com/2017.html[/URL]

    Mach3 2010 Screenset
    [URL]http://www.thecncwoodworker.com/2010.html[/URL]

    JointCAM - CNC Dovetails & Box Joints
    [URL]http://www.g-forcecnc.com/jointcam.html[/URL]

    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)


  3. #3
    Registered
    Join Date
    Jul 2010
    Location
    uSA
    Posts
    14
    Downloads
    0
    Uploads
    0

    Default Re: input pins changing status randomly

    I remembered one more oddity. While connected to the laptop through USB, the UC100 would randomly go offline. If that also happens with the XP parallel port (it doesn't pop up any message), then could it be the C10 parallel connector or the board?



  4. #4
    Member
    Join Date
    Jun 2010
    Location
    Australia
    Posts
    4252
    Downloads
    4
    Uploads
    0

    Default Re: input pins changing status randomly

    It DOES sound like a faulty connection somewhere.

    Cheers
    Roger



  5. #5
    Member ger21's Avatar
    Join Date
    Mar 2003
    Location
    Shelby Township
    Posts
    35538
    Downloads
    1
    Uploads
    0

    Default Re: input pins changing status randomly

    If the UC100 is losing connection, it's an issue with the USB connection to the UC100.

    Gerry

    UCCNC 2017 Screenset
    [URL]http://www.thecncwoodworker.com/2017.html[/URL]

    Mach3 2010 Screenset
    [URL]http://www.thecncwoodworker.com/2010.html[/URL]

    JointCAM - CNC Dovetails & Box Joints
    [URL]http://www.g-forcecnc.com/jointcam.html[/URL]

    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)


  6. #6
    Member
    Join Date
    Jun 2010
    Location
    Australia
    Posts
    4252
    Downloads
    4
    Uploads
    0

    Default Re: input pins changing status randomly

    Or maybe the USB port on the PC. One port on my desk machine is decidely wobbly.

    Cheers
    Roger



  7. #7
    Registered
    Join Date
    Jul 2010
    Location
    uSA
    Posts
    14
    Downloads
    0
    Uploads
    0

    Default Re: input pins changing status randomly

    I got my new C10 BOB today and replaced the other. Now it works fine and I did a 1/2 hour job without a hitch. Damn electronics. They're like employees on crack -- undependable!



  8. #8
    Member
    Join Date
    Jun 2010
    Location
    Australia
    Posts
    4252
    Downloads
    4
    Uploads
    0

    Default Re: input pins changing status randomly

    Most electronics are quite reliable, until they have been ... cracked?

    Cheers
    Roger



  9. #9
    Registered
    Join Date
    Jul 2010
    Location
    uSA
    Posts
    14
    Downloads
    0
    Uploads
    0

    Default Re: input pins changing status randomly

    I contacted Keiling and they had Arturo from CNC4PC contact me. He suggested checking for a ground loop. I went back to my old WinXP and parallel port and all was working well until yesterday. I was into about an hour run when the machine suddenly stopped and tripped the reset button. The bit wasn't jammed. I couldn't reset, so looked on the Diagnostics tab and all switches were lit up! Next, I unplugged the parallel cable and all the lights went out but nothing worked. Then I put my UC100 cable on the laptop and the same indication of all lights on happened. The NEW C10 board has a green status light and nothing has changed. I reset all the jumpers. It appears as if there is a sudden "reverse sensing" of the parallel port.



Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  


About CNCzone.com

    We are the largest and most active discussion forum for manufacturing industry. The site is 100% free to join and use, so join today!

Follow us on


Our Brands

input pins changing status randomly

input pins changing status randomly