1987 qt8 T2 help!
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  1. #1
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    Default 1987 qt8 T2 help!

    Need some help with my qt8 t2, it sat for a long time before I purchased it so I replaced the backup batteries first thing. Once I powered it up it wouldnít stay on unless you held down the on button and the screen was green snow. I found it had a 24v short and after speaking with Mitsubishi found that the fx773 board was bad, also replaced the power supply pcd14. Replaced the board now it will stay on but thatís it no screen but will flash on power up & off and all 0ís on control, Iíve tried the initializing process multiple times that Mazak sent me. Any advice would be greatly appreciated, thanks!

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    If you wont get anything on the screen I guess your monitor is broken or maybe the board that I dont remember the FX number of.
    I have replaced 2 old monitors with an video converter and a VGA monitor.

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    Quote Originally Posted by benganboll View Post
    If you wont get anything on the screen I guess your monitor is broken or maybe the board that I dont remember the FX number of.
    I have replaced 2 old monitors with an video converter and a VGA monitor.
    If I put the old board back in with the original power on issue the monitor will stay on if the on button is held down, speaking with Mazak and Mitsubishi they said thatís a good thing so Iím assuming the monitor is ok.

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    Check all your control cards are seating well --- this is tricky, as you can think they're all seated, when one may not be. I like to pop them in/out to help clean the contacts too.

    The re-initialize procedure has to work, else you've still got a board issue.

    The FX784-8 and FX784-9 are the main memory boards, so if the machine won't re-initialize, it could be one of these boards to blame. You can source spares on ebay, but make sure both boards come as a set (different revisions may not be compatible), and that the boards are for "YT2" (Yamazaki Turning T-2), and NOT "YMV2" (Yamazak Milling Vertical M-2).

    Good luck, let us know how you fare with it.

    ToolCat

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    Quote Originally Posted by cnctoolcat View Post
    Check all your control cards are seating well --- this is tricky, as you can think they're all seated, when one may not be. I like to pop them in/out to help clean the contacts too.

    The re-initialize procedure has to work, else you've still got a board issue.

    The FX784-8 and FX784-9 are the main memory boards, so if the machine won't re-initialize, it could be one of these boards to blame. You can source spares on ebay, but make sure both boards come as a set (different revisions may not be compatible), and that the boards are for "YT2" (Yamazaki Turning T-2), and NOT "YMV2" (Yamazak Milling Vertical M-2).

    Good luck, let us know how you fare with it.

    ToolCat
    ToolCat looks like someone was playing with it before I got it the fx784-9 board is a YM2! Thanks a bunch Iíll get one on the way and see what happens.

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    I forgot to mention, later versions of the T-2 came with only one main memory board, a FX884.

    (Earlier versions had two, the FX784-8 and FX784-9)

    I have read where someone successfully used a FX884 to replace the FX784-8 and -9...

    All the chips on the board can be copied using a chip read/writer (or similar, it's called...??).

    I haven't copied the chips, but it's something I (we) should get around to, if we plan to keep running the 'ol T-2's...

    ToolCat

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    Quote Originally Posted by cnctoolcat View Post
    I forgot to mention, later versions of the T-2 came with only one main memory board, a FX884.

    (Earlier versions had two, the FX784-8 and FX784-9)

    I have read where someone successfully used a FX884 to replace the FX784-8 and -9...

    All the chips on the board can be copied using a chip read/writer (or similar, it's called...??).

    I haven't copied the chips, but it's something I (we) should get around to, if we plan to keep running the 'ol T-2's...

    ToolCat
    Iíve got a fx884 and a fx784-9, the fx784 is the one that was a YM2.

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    Quote Originally Posted by cnctoolcat View Post
    I forgot to mention, later versions of the T-2 came with only one main memory board, a FX884.

    (Earlier versions had two, the FX784-8 and FX784-9)

    I have read where someone successfully used a FX884 to replace the FX784-8 and -9...

    All the chips on the board can be copied using a chip read/writer (or similar, it's called...??).

    I haven't copied the chips, but it's something I (we) should get around to, if we plan to keep running the 'ol T-2's...

    ToolCat
    Ordered the fx784-9 board and received a fx727 :-/ but for giggles I replaced it and left the fx784-9 out. Hit the power on and bam itís on, hydraulics are running and screen is perfect! Now going to attempt installing parameters.

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    I believe the FX727 board contains the PLC programming and ladder, as it too has a battery.

    Good you got it powered up!

    Sometimes when entering the parameters, you might encounter some that wonít take data, only showing ď***Ē.

    This can be a killer, or Iíve seen machines run fine with a few parameters starred out. Just have to press on to see...

    ToolCat

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    The program protect key must be in the unprotect position to
    properly complete the initialize, and enter parameters.

    All the chips on the board can be copied using a chip read/writer (or similar, it's called...??). "A PROM burner"

    I haven't copied the chips, but it's something I (we) should get around to, if we plan to keep running the 'ol T-2's...

    ToolCat


    If any of you folks have a newer machine with the M/T-32 control and have the FR-SF spindle control,
    there is an eprom inside and an X2864AP-25 chip for parameters.
    Best to back both of them up before you get a parameter alarm.

    Bill

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    So as this drama was unfolding, I got a call from a customer 1.5 Hr. one way that he has a parameter error on his
    VQC-1540. It turned out to be on the FR-SF spindle control.
    Monday I went to a customer (1 hour one way the other way) that has an identical machine and copied the Parameter chip to my Prom Burner computer.
    Then today I went back and copied the image to the chip giving the parameter error.
    Problem solved.

    Hopefully this will increase the urgency to make copies of this old code while it is not giving problems.

    Bill

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    Quote Originally Posted by hitandmiss View Post
    So as this drama was unfolding, I got a call from a customer 1.5 Hr. one way that he has a parameter error on his
    VQC-1540. It turned out to be on the FR-SF spindle control.
    Monday I went to a customer (1 hour one way the other way) that has an identical machine and copied the Parameter chip to my Prom Burner computer.
    Then today I went back and copied the image to the chip giving the parameter error.
    Problem solved.

    Hopefully this will increase the urgency to make copies of this old code while it is not giving problems.

    Bill
    Well Iíve entered in the parameters but all I can get the machine to do is open/close the chuck and unlock turret, I have a alarm 14 z axis drive servo and NC & MC leds. I swapped the boards around from x to z and the alarm followed it. Canít get the spindle or either axis to move but Iím not giving up!

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    Quote Originally Posted by Outcast8 View Post
    Well I’ve entered in the parameters but all I can get the machine to do is open/close the chuck and unlock turret, I have a alarm 14 z axis drive servo and NC & MC leds. I swapped the boards around from x to z and the alarm followed it. Can’t get the spindle or either axis to move but I’m not giving up!
    You will not get anything to move till you deal with the servo alarm, you are probably in estop besides.


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