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IndustryArena Forum > Manufacturing Processes > Turning > G02/G03 Issues - Okuma LNC8C Cadet
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  1. #1
    Join Date
    Jun 2023
    Posts
    47

    Exclamation G02/G03 Issues - Okuma LNC8C Cadet

    Hey all, I'm just trying to program a radius which will create a small rounded corner on the edge of my part.

    Note: I'm very new to Okuma machines but have a fair bit of operators experience.

    The machine is a Okuma Lathe Cadet LNC8C, quite old.



    I'm just trying to understand why I keep getting an alarm when I hit the G03 line.

    In reality the radius is borderline non-consequential, but I'd rather the machine produce the rounded corner opposed to having the guys do it by hand (not practical).

    Here are the lines that I have tried, without success:

    A) G03 X.898 Z-.0135 R.0135

    B) G03 X.898 Z-.0135 I0. K.0135

    C) G03 X.898 Z-.0135 L.0135

    Here are the lines prior to the error line, as well as one line which comes after, acting as the lead out:
    G01 X1.125
    G00 Z.1
    G01 X.8845 Z.0 F.01
    G03 "A"B"C"

    If there are any other data points or pieces of information that could help solve this problem I would be more than happy to provide them. Any help would be appreciated, thanks in advance!

    JL

  2. #2

    Re: G02/G03 Issues - Okuma LNC8C Cadet

    Your 3rd line down is incorrect, it should be G01 X.871 Z.0 F.01, not .8845. Your "X" is always double your "Z'' on a standard radius.

  3. #3

    Re: G02/G03 Issues - Okuma LNC8C Cadet

    Also C) option is easiest, sorry forgot that.

  4. #4
    Join Date
    Jun 2015
    Posts
    4154

    Re: G02/G03 Issues - Okuma LNC8C Cadet

    hy natha

    draw a circle in cad, etc, from point xaya to xbyb, arch<180*, thus less than half

    g-code would be : G00 X=2*ya Z=xa, folowed by G02or03 X=2*yb Z=xb L=radius F=feed G95or94

    that's all ... once this works, you may mode to compensation codes, or whatever is next on your list

    is all ok ? kindly
    Ladyhawke - My Delirium, https://www.youtube.com/watch?v=X_bFO1SNRZg

  5. #5
    Join Date
    Jan 2009
    Posts
    55

    Re: G02/G03 Issues - Okuma LNC8C Cadet

    Try this

    G1 X.8 Z0 F.005
    G76 X X.898L-.0135
    and Z- to your next X move

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