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IndustryArena Forum > Machine Controllers Software and Solutions > Fanuc > How do I cancel a G92 on the fly?
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  1. #1
    Join Date
    Oct 2009
    Posts
    4

    Question How do I cancel a G92 on the fly?

    Hello everyone. I just got a refurbished toshiba mill with a Fanuc 32i controller. Does anyone know how to cancel a G92 on the fly? I was using a Tosnuc 888 and it was just a matter of a G53 and recalling the fixture offset. This isn't working for me on the Fanuc.
    Any help would be appreciated.
    Thanks.

  2. #2
    Join Date
    Apr 2009
    Posts
    1379
    you can use a fly swatter. I have never seen a g92 on a fly.

  3. #3
    Join Date
    Feb 2006
    Posts
    1792
    It remains effective only in the current machining session. So, cycle power to cancel it.

  4. #4
    Join Date
    Feb 2008
    Posts
    586
    I think you can:

    G28G91Z0
    G28G91X0Y0
    G90G92X0Y0Z0 (or whatever your numbers are supposed to be at "home".

  5. #5
    Join Date
    Feb 2006
    Posts
    1792
    You are right.

    In many cases, Home is not (0,0,0). So, you have to remember (and type) the coordinate values at home position.

    Is is not simpler to cycle power? Of course, when you want to cancel it in the same program, you cannot cycle power! But such requirements are likely to be rare.

  6. #6
    Join Date
    Jun 2006
    Posts
    25
    G53Z0W0
    G53X0Y0
    G92X0Y0Z0

    Should work.

  7. #7
    Join Date
    May 2007
    Posts
    781
    I got some Mit wire EDMs and they set the G92 location to the current position every time you hit the reset button.
    I just put a line at the to of every program.

    G53G92X0.0Y0.0

  8. #8
    Join Date
    Nov 2009
    Posts
    9
    I have found that not all controllers will allow you to easily cancel a G92 move. One code I found to work on at least one controller was:

    G92.2X0.Y0.
    or
    G92.3X0.Y0.

    We have a Northwood Router at my shop that we program with AlphaCAM and the post file that Northwood built for it used G92 for sub repeats. So I called Northwood to ask how to cancel the G92 move out because the G92.2 and G92.3 moves did not work. After sitting on hold for about a half an hour they finally came back on the line and said "You don't ever want to use a G92 move on that machine because it could cause it to crash!!" So what ever I modified the post that Northwood built for us to use G52 instead, and it works flawlessly.

  9. #9
    Join Date
    Feb 2006
    Posts
    1792
    I am not sure, but G90 G92.1 X0 Y0 might work on Fanuc. Somebody may try and report the result.

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