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IndustryArena Forum > Machine Controllers Software and Solutions > Fanuc > Fanuc 0iMC -9031 Motor lock or V Sig Loss
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  1. #1
    Registered
    Join Date
    Dec 2006
    Posts
    225

    Fanuc 0iMC -9031 Motor lock or V Sig Loss

    Dear Sirs

    In MDI/Auto mode, only in case of one particular tool, when spindle speed is more than 1500 rpm, we find Load on spindle (L) as seen at the bottom of position screen to be shooting upto 164%(although tool is running on load ie not in touch with job) and hence trips with alarm 9031, we dont have this problem in case of any other tools even at 2000 rpm

    We replaced tool with new one

    Spindle Motor has timing belt and there is no gear box.

    We can not doubt feedback, as no problem in case of any other tools even bigger than this one

    With same set of toolings and same job being made since last 5 years

    Kindly revert

  2. #2
    Registered
    Join Date
    Feb 2012
    Posts
    1

    Re: Fanuc 0iMC -9031 Motor lock or V Sig Loss

    9031 spn 1 motor lock alarm on fanuc control cnc mill

  3. #3
    Registered
    Join Date
    Apr 2012
    Posts
    18

    Re: Fanuc 0iMC -9031 Motor lock or V Sig Loss

    Does the motor have dual winding contactor? It may be one 'range' contacts are bad.

  4. #4
    Registered
    Join Date
    Nov 2006
    Posts
    174

    Re: Fanuc 0iMC -9031 Motor lock or V Sig Loss

    I would check the pullstud first, if it is different, it may lead to different travel of the collet mechanism

  5. #5
    Member
    Join Date
    Dec 2013
    Posts
    38

    Re: Fanuc 0iMC -9031 Motor lock or V Sig Loss

    Quote Originally Posted by M.RISHIKESH View Post
    Dear Sirs

    In MDI/Auto mode, only in case of one particular tool, when spindle speed is more than 1500 rpm, we find Load on spindle (L) as seen at the bottom of position screen to be shooting upto 164%(although tool is running on load ie not in touch with job) and hence trips with alarm 9031, we dont have this problem in case of any other tools even at 2000 rpm

    We replaced tool with new one

    Spindle Motor has timing belt and there is no gear box.

    We can not doubt feedback, as no problem in case of any other tools even bigger than this one

    With same set of toolings and same job being made since last 5 years

    Kindly revert
    TRY M 40
    M 41
    or check the motor

  6. #6
    Junior Member
    Join Date
    Feb 2019
    Posts
    7
    IS the tool too heavy? Try to lower the speed.

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