Diagnosing older Fanuc 0T problem


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Thread: Diagnosing older Fanuc 0T problem

  1. #1
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    Default Diagnosing older Fanuc 0T problem

    Recently, I started having issues with an older Yang/Yam Lathe running Fanuc 0T.

    Power Supply died and was replaced with a refurb about a year and a half ago.
    Currently, the machine will run but when you ramp the spindle to a high rpm quickly in a program or manually, Everything cuts out and I get X and Z servo Amp failures and contactor disconnects.
    Input voltage is correct. Errors #1 shows up on the Power Supply and 30 on the Spindle Drive after error occurs. The contactor in the back started making a small pulsing buzz like an alarm clock after it engages and starts and stops randomly. Checking the voltage going to the contactor coil, I am getting 230v

    I am wondering if this is an actual issue with the power supply/motor or if the contactor coil is getting weak and unclamps when the machine draws a higher load upon spindle ramp.

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  2. #2
    Member davesnd's Avatar
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    Default Re: Diagnosing older Fanuc 0T problem

    Monitor the coil voltage with an analog meter during the issue and see if the voltage drops. I'd replace the contactor

    Sent from my G8343 using Tapatalk

    Last edited by davesnd; 08-16-2019 at 05:37 AM.


  3. #3
    Member Alamgeer's Avatar
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    Default Re: Diagnosing older Fanuc 0T problem

    Hope this helps

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Diagnosing older Fanuc 0T problem

Diagnosing older Fanuc 0T problem

Diagnosing older Fanuc 0T problem