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IndustryArena Forum > Machine Controllers Software and Solutions > Fanuc > Problem with Fanuc - Illegal command G71-G76
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  1. #1
    Join Date
    Oct 2003
    Posts
    128

    Problem with Fanuc - Illegal command G71-G76

    I have a Hawk lathe with a 21i giving me the above error. I cannot figure out what the problem is.

    The first block is a straight drill cycle, no peck and it errors

    The second is a peck drill cycle (.083) and contains Q parameter, no error
    I tried adding Q0000 but that didn't work either.
    What should I try? Thanks!!

    Code blocks are below

    Error
    N84 G74 R.005
    N85 G74 Z-.025 F.0026
    N86 G80

    No Error
    N98 G74 R.005
    N99 G74 Z-2.1002 Q0835 F.0026
    N100 G80
    Thanks
    Marc

  2. #2
    Join Date
    Dec 2013
    Posts
    5716

    Re: Problem with Fanuc - Illegal command G71-G76

    G74 requires the Q word. Try setting Q = Z Q0025

    or just do a G1 move.
    Jim Dawson
    Sandy, Oregon, USA

  3. #3
    Join Date
    Oct 2003
    Posts
    128

    Re: Problem with Fanuc - Illegal command G71-G76

    Quote Originally Posted by Jim Dawson View Post
    G74 requires the Q word. Try setting Q = Z Q0025

    or just do a G1 move.

    Thanks, I'll try that in the AM

    The code comes from my post processor in Bobcad. I'll take a look and see if I can fix that also.
    Thanks
    Marc

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