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IndustryArena Forum > MetalWorking Machines > Mori Seiki Machines > Mori Seiki lathes > CL-15 with Yasnac LX3 - G74 gone crazy
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  1. #1
    Join Date
    Mar 2009
    Posts
    8

    CL-15 with Yasnac LX3 - G74 gone crazy

    Working on getting our new old lathe up and going. Got to drilling and am working out the G74 cycle. Got it running good, then when it got to the bottom of the hole it went rouge in X. I hit feed hold when I heard the drill snap and it was at X-1.999. The only place I even have an X negative value in my program is for the part off at the end.

    Here's my code:
    Code:
    G0 X0. Z1.
    G98
    G0 Z.1
    G99
    G74 X0. Z-1.1902 K.05 D1. F.003
    G98
    G0 Z1.
    X3. Z3.
    M05
    M09
    Do I need to add an I0. value in there? Where on earth is it getting this negative X move from?

  2. #2
    Join Date
    Aug 2011
    Posts
    2517
    I don't know about the LX control but on Fanuc it's like this...
    G0 X0 Z50.0
    G0 Z3.0 (1)
    G74 Z-500.0 K2.0 F0.2

    and that's all.
    at the Z depth it'll rapid to point (1) in Z only.

    when working things out it's a good idea to dry run it without a part in the chuck and set the workshift so the tool is well clear

  3. #3
    Join Date
    Mar 2003
    Posts
    2932
    On the LX3, D is the retract (in X) at the bottom of the hole. Set it to D0.

  4. #4
    Join Date
    Jun 2004
    Posts
    236
    Try taking the D value out and put in R1

    Wayne
    Visit our face book page, search on FaceBook; High-Desert-Precision-CNC-Machining-Nosalas-Hobby-Shop

  5. #5
    Join Date
    Mar 2009
    Posts
    8
    Guess I'm going to have to change my settings, never got updates to this.

    Long story short, ended up finding the same, the D value was the issue. Deleted that line and she's good to go. Thanks for the help!

    Now on to power tapping...:wee:

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