Problem Freqrol fr-sf on Mazak

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Thread: Freqrol fr-sf on Mazak

  1. #1
    Member Yatarra's Avatar
    Join Date
    Dec 2019

    Default Freqrol fr-sf on Mazak

    Again we have problem with our QT15N T32-2. Our inverter displays an error after turning on the power. It's E7 alarm (NC Emergency). But when we turn on the main panel, it's ready to work (shows "r 0"), but it doesn't supply power to the spindle motor. Main panel shows only alarm 128 Emergency stop.

    there are 2 LEDs on the power supply SF-PW.
    Led 1 (green) and led 2 (orange)

    On the SF-CA card there are just Led 2 (orange), When the main panel is switched on, the LED 10 (orange) lights up and after a while turns off.

    The instructions are written:

    LED2 - Lights when the base of the inverter/converter transistor
    cuts off.

    Also I saw there is 56 alarm on my servo drive.

    Any ideas where I should start shooting?

    Adds a video to clarify the situation:

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  2. #2
    Join Date
    Feb 2011

    Default Re: Freqrol fr-sf on Mazak

    If you have alarm 56 on all other drives then the problem is the spindle drive. You can confirm this by moving the terminator plug off the spindle drive and put in the last daisy link connection on the axis drive. Power up machine should come out of Estop.
    Unless you want to try to repair the drive you should send it in for repair. Power supply has amber LED on so that should be good.
    One other test leave the machine on for 30 minutes, then power off and on if it is ok that is an indicator that there are components failing in the drive at cold start.

    Your truly Carmine Moriello
    From www.AccurateMachineRepair
    Specialize in Mazak Machine tools in greater NY/NY/PA/DE/CT area

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Freqrol fr-sf on Mazak