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  1. #1
    Join Date
    Mar 2007
    Posts
    14

    Question Mach3 not sending out signals

    I just finished building my cnc router table, but I can't get it to move through mach3. I've checked just about everything a hundred times but it just doesn't work.

    The steppers are running on a hobby cnc board, which I have had working with mach2 previously.

    -Connected with a parallel port cable
    -The cable is not a cross over
    -correct port address has been set in Mach3
    -parallel port monitor software lets me send pulses to the port, which makes the steppers move, so it looks like the port, cable and hobby cnc board are all working correctly.
    -pin numbers have been correctly assigned in Mach3
    -diagnostics screen in mach3 shows a graphic of the parallel port, running a program doesn't show any action there, so I guess it isn't sending out anything to the port.
    -sample road runner code does show the spindle move on screen and coordinates are changing as well.

    Based on these observations, what have I missed?

    I finally got around finishing my machine and was looking forward to today as I would machine my first part. In stead I've been spending half the day checking cables and settings and still nothing moves

  2. #2
    Join Date
    Mar 2003
    Posts
    35538
    Are the pins assigned to Port 0 instead of Port 1?
    Gerry

    UCCNC 2017 Screenset
    http://www.thecncwoodworker.com/2017.html

    Mach3 2010 Screenset
    http://www.thecncwoodworker.com/2010.html

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

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

  3. #3
    Join Date
    Mar 2007
    Posts
    14
    Thanks for the quick reply Gerry! Both direction and step are assigned to the correct port number...

  4. #4
    Join Date
    Mar 2007
    Posts
    14
    I've just downloaded Mach2 and everything works fine there. Still I'd rather use Mach3...

  5. #5
    Join Date
    Mar 2003
    Posts
    35538
    I've seen people have this problem before, but don't have an answer. Try creating a new profile from scratch.
    Gerry

    UCCNC 2017 Screenset
    http://www.thecncwoodworker.com/2017.html

    Mach3 2010 Screenset
    http://www.thecncwoodworker.com/2010.html

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

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

  6. #6
    Join Date
    Jan 2010
    Posts
    1

    I just came through this problem

    Did you assigned output pin# of XYZ enables?

    What version Mach3 are you using? Some versions may not responding on your computer, just try another one untill you can make it happen.

    Did you see signal high or nothing on the xyz indicating LED when Mach3 loaded? If signals are all high, you need to pick active low items for xyz axis.

    Hope this help!

  7. #7
    Join Date
    Jul 2003
    Posts
    114
    Are you using a breakout board that requires the charge pump signal? I have encountered a similar problem when I didn't have the charge pump enabled on the correct output pin to the breakout board. I don't believe that Mach2 had the charge pump feature.

    Russ

  8. #8
    Join Date
    Jan 2012
    Posts
    0

    Communication failure with mach 3 NEED HELP PLEASE

    Last night I was working on my machine and everything worked well, this morning I turned everything on and it seems I have no communication to my breakout board, which is a sound logic supplied by Bob Campbell, charge pump won't activate to turn the drives on, and it does not acknowledge a signal from the limit switches, it seems like the program and or the computer not working together

    I tested the breakout board per manual and everything seems to be working fine, the mock three program on computer seems to be working normal as always, I haven't a clue what's wrong.

    Is there some way of testing to see if I am getting signals through the parallel port??? Thanks Darren

  9. #9
    Join Date
    Jul 2003
    Posts
    114
    I had an instance of the same thing last week. In my case I used the machine the night before and then came in the next day and nothing worked.

    Turned out that my xml file had gotten corrupted. I went to the backup directory and copied a file from a week earlier to the mach3 root and renamed it to xml and everything worked again. I have no idea what might have caused the problem.

    Thank goodness for the backup directory.

    Check your config and make sure your settings are correct there. I had lost all of mine.

    Russ

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