1984 Mazak ST 40 4 axis Fanuc 6T Controls
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  1. #1
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    Default 1984 Mazak ST 40 4 axis Fanuc 6T Controls

    Please help! I am trying to resurrect an old Mazak ST40 4 axis with fanuc 6t controls. I have an alarm -Z OT 221. controls still say LSK. I cannot clear it. It is for the upper turret I think. Neither turret is on the over travel limit switch.

    Thanks, Pumpguy

  2. #2
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    Jul 2010
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    Just because it is NOT on the switch,
    does not mean that the switch is closed,
    and/or there is a broken wire,
    a bad relay powering the e-stop string,
    a bad input on the I/O board in back of the large Mazak board in the bottom of the control.

    Just some ideas to get you started.

    Bill

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