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Thread: Mitsubishi Meldas 520...Will not Turn on spindle on Handle mode

  1. #1
    CNCMACHINE101 Guest

    Default Mitsubishi Meldas 520...Will not Turn on spindle on Handle mode

    I have a 1995 Mitsubishi MV5B Meldas 520am control. I bought the machine used and I found this problem, When i turn the swith to MDI on manual mode. I Can turn on the spindle. Works just fine. But lets say i want to make a quick cut or drill a quick hole when i turn the switch over to Handle The spindle turns off. I could manually jog the table but i cant get the spindle to turn on. It doesnt alarm or give me anything. It should let me jog while the spindle is on right?. The machine runs programs without a problem. but this bothers me I am either thinking a Parameter was switched( IF THERE IS ONE) or a board is bad but that wouldnt make sense because i would figure several other things would go bad. If anyone can help me out I would appreciate it.

  2. #2
    Guest Guest

    Default

    Most cnc machine doors usually have to be closed to run a spindle. This is for safety. There is no bypass parameter to allow this.

  3. #3
    Guest Guest

    Default

    Hi. Door closed. Still not working.

  4. #4
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    Default

    If it lets you turn the spindle on in MDI and immediately shuts off when you hit the jog or handwheel button, I would say that in the logic they have a normally closed contact for the spindle functions.

    M03 HANDWHEEL JOG SPINDLE ON
    I I-------------I/I------------I/I--------------------------------------O-------

    I would search the logic and see if it has anything like that in place. And then again I am not at all familiar with Mitsu contols, so I'm not sure if you can view the ladder.

    Hope this helps you in some way.
    Cody Stamper



    (Note: The opinions expressed in this post are my own and are not necessarily those of cnc-professional-forum.com and its management)

  5. #5
    Guest Guest

    Default

    Hi. I had a tech look at the ladder. He said that everthing looks good and it should turn on. but it doesnt, Dont know I will continue scratching my head. thanks for the Help.

  6. #6
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    Default

    Did he also check the logic for jog functions to make sure there wasn't a normally closed contact in there?

    JOG M03 M04 JOG
    I I---------I/I----I/I--------------O--

    HANDWHEEL M03 M04 HANDWHEEL
    I I-------------I/I---I/I-------------O---


    Just thinking out loud.....
    Cody Stamper



    (Note: The opinions expressed in this post are my own and are not necessarily those of cnc-professional-forum.com and its management)

  7. #7
    Guest Guest

    Default

    Have you tried putting the machine in handle mode, then using S command from the monitor screen? Then using the had wheel to move the axes....

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