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  1. #1
    Join Date
    Jul 2015
    Posts
    13

    G41 & G42 are disabled

    Hi all,
    my Morie seiki fanuc 10 M mill does not recognize G41 & G42
    is there any parameter or keeprelay that should be changed to solve the problem?
    Thanks
    Best Regards

  2. #2
    Join Date
    Dec 2008
    Posts
    3110

    Re: G41 & G42 are disabled

    Quote Originally Posted by hadi-nour View Post
    Hi all,
    my Morie seiki fanuc 10 M mill does not recognize G41 & G42
    is there any parameter or keeprelay that should be changed to solve the problem?
    Thanks
    Best Regards
    Cutter comp is usually standard on CNC machines

    How do you know it is disabled ?

    How are you programming it ?

    G41 or G42 is used with a D(offset #) and must be implemented on a line move ( some machines can start/finish comp on an arc movement...)

    programming example
    G1 Z-1. F123.
    G41 D1 X123.456 Y123.456 F123.
    G3 X Y
    ...
    G1 G40 X123.456 Y123.456
    G0 Z1.


    The value placed in the D# is dependant on what method you define the path ( the following methods should NOT be mixed together )
    - in control - the path is where you want the edge of the cutter to run against ( normally the cutter radius is put into the D offset register ) ( a value smaller than the tool radius makes the cutter run closer to the part, larger value make the cutter stay further away)
    - wear - the programmed path is already offset form the part by the tool radius, D# is set to zero if the cutter is the same as programmed, a -ive value makes the cutter run closer to the part, +ive value leaves more material )

    normally, # is the tool number and is kept common for the length & radius callout......... ( some machines require a tool diameter to be input )

    Some older Fanucs only have a Wear/Geometry offsets page...so...
    ...IMO.. the tool length register number should be kept the same as the tool number, and the D# stored (say 30 registers higher, depends on how many tools in your tool carousel )... reason is the Geom & Wear offsets are added together

  3. #3
    Join Date
    Aug 2011
    Posts
    2517

    Re: G41 & G42 are disabled

    also, if it truly is disabled or not present putting G41 or G42 in the program will give you an alarm, illegal G-Code.
    do you get an alarm or is it that you just don't understand how to use it/how to program it?

  4. #4
    Join Date
    Jul 2015
    Posts
    13

    Re: G41 & G42 are disabled

    Quote Originally Posted by Superman View Post
    Cutter comp is usually standard on CNC machines

    How do you know it is disabled ?

    How are you programming it ?

    G41 or G42 is used with a D(offset #) and must be implemented on a line move ( some machines can start/finish comp on an arc movement...)

    programming example
    G1 Z-1. F123.
    G41 D1 X123.456 Y123.456 F123.
    G3 X Y
    ...
    G1 G40 X123.456 Y123.456
    G0 Z1.


    The value placed in the D# is dependant on what method you define the path ( the following methods should NOT be mixed together )
    - in control - the path is where you want the edge of the cutter to run against ( normally the cutter radius is put into the D offset register ) ( a value smaller than the tool radius makes the cutter run closer to the part, larger value make the cutter stay further away)
    - wear - the programmed path is already offset form the part by the tool radius, D# is set to zero if the cutter is the same as programmed, a -ive value makes the cutter run closer to the part, +ive value leaves more material )

    normally, # is the tool number and is kept common for the length & radius callout......... ( some machines require a tool diameter to be input )

    Some older Fanucs only have a Wear/Geometry offsets page...so...
    ...IMO.. the tool length register number should be kept the same as the tool number, and the D# stored (say 30 registers higher, depends on how many tools in your tool carousel )... reason is the Geom & Wear offsets are added together
    I use G41 as you mentioned but it does not offset the tool as much as the tool radius.
    I also set the tool diameter in D# and it had no difference

  5. #5
    Join Date
    Jul 2015
    Posts
    13

    Re: G41 & G42 are disabled

    Quote Originally Posted by fordav11 View Post
    also, if it truly is disabled or not present putting G41 or G42 in the program will give you an alarm, illegal G-Code.
    do you get an alarm or is it that you just don't understand how to use it/how to program it?
    I don't have an alarm, and it just does not work

  6. #6
    Join Date
    Dec 2012
    Posts
    392

    Re: G41 & G42 are disabled

    Hi,

    Can you post your nc-code ?

    Regards,
    Heavy_Metal.

  7. #7
    Join Date
    Aug 2011
    Posts
    2517

    Re: G41 & G42 are disabled

    hmmm, no alarm so yes, clearly you dont understand how to program it correctly.
    please post your program here and we can fix it for you.

  8. #8
    Join Date
    Jul 2015
    Posts
    13

    Re: G41 & G42 are disabled

    Quote Originally Posted by fordav11 View Post
    hmmm, no alarm so yes, clearly you dont understand how to program it correctly.
    please post your program here and we can fix it for you.
    Thanks for your comments. I have checked the program and find the problem. as you mentioned, that was a programming error with no alarm.
    Regards,

  9. #9

    Re: G41 & G42 are disabled--same problem

    Dear sir,
    We have also same problem.
    This program is working without alarm but G41 not working

    G01 G91 Z-0.1 F2000 ;
    G90 ;
    G01 G41 D10 X10.0 ;
    G03 I-10.0 ;
    G01 G40 X0.0 ;
    M99 ;

    This program working correctly without G41

    G01 G91 Z-0.1 F2000 ;
    G90 ;
    G01 X10.0 ;
    G03 I-10.0 ;
    G01 X0.0 ;
    M99 ;

    what is the problem---- FANUC Series Oi-MF

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