Yasnac MX2 Mori MVJR troubles
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  1. #1
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    Default Yasnac MX2 Mori MVJR troubles

    Mori MVJR with MX2 control.

    1st problem; after months of working without any problems then sitting unused for 2 weeks I was unable to DNC to the control. I was able to send programs from the CNC control to the computer.

    Checked continuity to wires, to CP07 board, all good.

    Disconnected and reconnected the cables to the boards in hopes that it was a bad connection, now things are much worse.

    If I start it with the number switch set to 0 or 1 the monitor never turns on, servo won't turn on.
    If I start it with the number switch set to 3 message WORK OFF LINE (or something like that)
    If I start it with the number switch set to 4 Monitor lights up and servo can turn on but the following errors are returned:
    174 Memory
    OT 4
    OT X
    OT Y
    OT Z
    The lower half of the control seems to not have power.
    Cannot do anything.

    The parameters are there but I can't edit them.

    Not sure what to do next, Yaskawa parts and service are so expensive it would be easy to spend more than the machine is worth.

    I would like to try regenerating the parameters but the notes I have for that must be incomplete, they don't seem to do anything now.

    These are the notes I have, I think there is something missing, it was years ago last time I did that.

    #7 Generator Push

    RES, NEXT & ORG

    Then

    PRM, OFS& NC DATA CLEAR

    #4 Load Push

    RES, NEXT & WRT

    Then

    SYSTEM TOTAL DATA MAKE

  2. #2
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    Default

    Against all odds I fixed the CP02 board myself and got my MVJR working again.
    I really wanted to have that experience of being able to say "I fixed a
    circuit board".

    I replaced a lot of chips several 75189 about two 75188, no
    improvement. A few other that I forget now.
    Then replaced two 75175 and it worked but gave some RS232 errors.
    Looked over the damage I did to the board, found a broken trace,
    soldered in a jumper wire and now it is working.

    Only two odd things that I noticed, the beep that I used to get when I
    pressed keyboard buttons is gone, I'm sure that was a parameter but I
    can't remember which one now.
    Also the jog buttons aren't working (no big deal i never use them
    anyhow)

    I think I am beginning to understand the deal with the MX2, it seems to
    work only when it senses that it is about to be junked and that you have
    given up all hope of fixing it but keep trying anyhow.

  3. #3
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    Default Good going

    Good job Schmidt.
    I'm about to sink my teeth into a Yasnac Mx1 controller on my Matsuura VMC. It doesnt zero reference for some reason. Reading your post has inspired me to jump into the problem.

    Sixtysix

    Quote Originally Posted by schmidtmw View Post
    Against all odds I fixed the CP02 board myself and got my MVJR working again.
    I really wanted to have that experience of being able to say "I fixed a
    circuit board".

    I replaced a lot of chips several 75189 about two 75188, no
    improvement. A few other that I forget now.
    Then replaced two 75175 and it worked but gave some RS232 errors.
    Looked over the damage I did to the board, found a broken trace,
    soldered in a jumper wire and now it is working.

    Only two odd things that I noticed, the beep that I used to get when I
    pressed keyboard buttons is gone, I'm sure that was a parameter but I
    can't remember which one now.
    Also the jog buttons aren't working (no big deal i never use them
    anyhow)

    I think I am beginning to understand the deal with the MX2, it seems to
    work only when it senses that it is about to be junked and that you have
    given up all hope of fixing it but keep trying anyhow.

  4. #4
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    Sep 2002
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    Lawrenceville GA USA
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    Default

    Thanks a lot for taking the time to offer your solution. I have never used a Yasnac control myself so I wouldnt have been any help to you but your solution may help someone else in the future.

    Charles

  5. #5
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    Default

    Though a long dead thread .. I'll give it a try


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