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IndustryArena Forum > GENERAL MANUFACTURING PROCESSES > TURNING > Spindle rotates only clockwise (M3 works, but M4 does not work)
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  1. #1
    Member
    Join Date
    Jun 2019
    Posts
    1

    Spindle rotates only clockwise (M3 works, but M4 does not work)

    Dear guys,

    I have a Fanuc turning machine, Oi mate TC.

    The spindle rotates CW when I run S300 M3. But it does not rotate when I run S300 M4.
    So the spindle only rotates clockwise and it does not rotate counter clockwise.
    I checked the (M3 and M4) contactor. It works when running M3 and M4 but the motor only response to M3.

    Any suggestions?

  2. #2
    Junior Member
    Join Date
    Jun 2010
    Posts
    3886

    Re: Spindle rotates only clockwise (M3 works, but M4 does not work)

    Faulty contactor for M4. Check output with a voltmeter.

    Cheers
    Roger

  3. #3
    Gold Member
    Join Date
    Feb 2009
    Posts
    6026

    Re: Spindle rotates only clockwise (M3 works, but M4 does not work)

    Never seen a Fanuc use forward and reverse contactors...this must not have a spindle drive?

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