G71 problem on Fanuc 15-TF


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Thread: G71 problem on Fanuc 15-TF

  1. #1
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    Default G71 problem on Fanuc 15-TF

    Trying to start using G71 multi-repetitive cycle on Puma 8HC turning center.

    This is simple code I am trying:

    Code:
    G20 G90 M17
    G28 U0. W0. T0600 S600
    M42
    G50 S2000
    G57
    
    M03
    (TURNING TOOL #6) 
    G0 X2.2 Z.2 T0606
    (TOOL CLEAR OF PART)
    G96 G99
    
    G71 P100 Q101 D.05 U.02 W.02 F.010
    N100 X.5 Z0.0
    X0.7 Z-.45
    Z-.105
    X1.25
    G03 X1.75 Z-1.55 R.5
    G01 Z-2.5
    N101 X2.2
    M05
    M30
    %
    When the G71 line is executed I get alarm: "Illegal use of decimal point"

    Can anyone tell me what I am doing wrong?

    Cheers,
    Steve E

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  2. #2
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    Default Re: G71 problem on Fanuc 15-TF

    Apparently it's not liking one of the decimals in one of the variables in the canned cycle.

    See if it runs this way?

    G71 P100 Q101 DO5OO U0200 W0200 F0100

    You need a G1 in the N100 line.

    I don't understand the Z-.105 move. Is it a typo?

    Brent

    Last edited by yardbird1969; 01-25-2017 at 09:09 PM.


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    Default Re: G71 problem on Fanuc 15-TF

    Try
    G71 P100 Q101 D05 U.02 W.02 F.010

    If that doesnt work try taking the point out on feed
    If you send me your email I'll send you the manual



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    Default Re: G71 problem on Fanuc 15-TF

    Quote Originally Posted by yardbird1969 View Post
    Apparently it's not liking one of the decimals in one of the variables in the canned cycle.

    See if it runs this way?

    G71 P100 Q101 DO5OO U0200 W0200 F0100

    You need a G1 in the N100 line.

    I don't understand the Z-.105 move. Is it a typo?

    Brent
    Yup, that was a typo. It should be Z-1.05 So I'll try that & see what happens, and if that doesn't work I'll remove the decimal points as suggested.

    Cheers,
    Steve E



  5. #5
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    Default Re: G71 problem on Fanuc 15-TF

    My control did NOT like decimal point for the 'Dxx' parameter. I had to use 'D0500' for a .050" deep rough pass.

    Here is my working code:

    G20 G90 M17
    G28 U0. W0. T0600 S600
    M42
    G50 S2000
    G57

    (TURNING TOOL #6)
    G0 X2.2 Z.2 T0606
    (TOOL CLEAR OF PART)
    G96 G99

    M03
    G01 U0. W0. F0.01
    G71 P100 Q101 U0.01 W0.010 F0.01 D0500
    N100 G01 X.5 Z0.0 F0.005
    X1.0 Z-.45
    Z-1.05
    X1.25
    G03 X1.75 Z-1.55 R.5
    G01 Z-2.0
    N101 X2.2
    G70 P100 Q101
    M05
    M30
    Thanks for the guidance.

    Cheers,
    Steve E



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G71 problem on Fanuc 15-TF

G71 problem on Fanuc 15-TF