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  1. #1
    Join Date
    Jun 2008
    Posts
    18

    G71 Cycle for Left-Hand Turning

    I'm making some flange-shaped parts and need to turn some features on both sides of the flange itself. My lathe is a front-turret machine with a Fanuc OTC control. For the features on the -Z side of the flange, I want to use a G71 cycle with a left-hand tool . When using the G71 cycle for right-hand turning, the pullout moves are +X and +Z. More my left-hand turning, however, I need the pullouts to be +X and -Z. How can I accomplish this?

  2. #2
    Join Date
    Feb 2006
    Posts
    1792

    Re: G71 Cycle for Left-Hand Turning

    The pullout direction depends on the position of the tool just before calling G71.
    For left-to-right turning, the tool should be placed to the left of the first point on the profile. Proper pullout would be automatically done.

  3. #3
    Join Date
    Mar 2003
    Posts
    2932

    Re: G71 Cycle for Left-Hand Turning

    This is from the 0TC Lathe Operator's Manual (the highlighted one would be used for the Z- side of the flange.

  4. #4
    Join Date
    Feb 2006
    Posts
    1792

    Re: G71 Cycle for Left-Hand Turning

    For in-depth information, you may like to have a look at it:
    https://www.amazon.com/dp/B01FOPN3RW

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