Mazak QT20 Fanuc Spindle issue.
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  1. #1
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    Exclamation Mazak QT20 Fanuc Spindle issue.

    Hi all.
    I have a 1986 QT20N (Mazatrol CAM T2) with Fanuc model 12 (A06B-6044-H212) spindle drive.
    Machine is working well for about 10-15 minutes but after that Alarm 20 NMI emergency stop and alarm 204 spindle controller malfunction is turning on.
    So i have to wait for about 40-50 minutes to be able to work again about 10-15 minutes.
    Is like some component is heating and i have to wait to cool down.

    Any idea about this malfunction?
    Or, Can somebody advise me about a AC spindle drive upgrade? Or a VFD sensor less much newer that is compatible with my machine?
    I would really hate to start a so called retrofit with Chinese controller, motors and drives and give up Mazatrol.

  2. #2
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    yes, there is a way

    there is a thread in this forum about a Hitachi VFD retrofit

  3. #3
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    A temporary fix to keep you going is to open the electrical cabinet and put a fan there to cool the drive. My QT 28 does that due to a weak fan on my NC unit which causes a connection issue between my one board and the NC unit.

  4. #4
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    can you point me at that post? i have searched but no success. thanks

  5. #5
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    i searched several things
    finally just tried Mazak spindle drive and got -0- results
    so
    you'll need someone smarter than the PM search function
    sorry
    my suggestion would be to p.m. Toolcat
    i would imagine he remembers the project and might even know how to search this joint

  6. #6
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  7. Likes cnctoolcat liked this post
  8. #7
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    you da man JT

    thanks


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