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Thread: work offsets

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  1. #1
    Join Date
    Sep 2006
    Posts
    29

    work offsets

    Hi All,

    we have just got a matchmaker 2007 with fanuc control.

    I am having problems setting the right work offsets(g54 g55 etc) and the right tool length offsets,

    Can someone help with this,

    I have tried going to the offsets page,. then work,, typing xo measure- the figure is changing but when I run the program it is not going to the correct postion .. I also cant find the right way to set the tools.

    I am used to our haas mini mill which is quite easy to use. We are loading programs in from onecnc if it makes a difference


    cheers

  2. #2
    Join Date
    Mar 2003
    Posts
    2932
    Setting tool length offsets is usually done with Z [INP-C]. Before you start, make sure that the RELATIVE and MACHINE position displays match. If not, try performing a manual ZERO RETURN. They should match then.

    When you say "the figure is changing"... is it changing to the same value as the MACHINE postition (when you type X0 [MEASUR])? It should be.

    If so, try to MDI in a command to move X to 0: G0 G54 G90 X0. EOB, INSERT and CYCLE START. X shouldn't move, and the X ABSOLUTE position should read 0.

  3. #3
    Join Date
    Feb 2006
    Posts
    1792
    The following information is with reference to 0i system. Check the system variable numbers for other control versions.

    To simplify offset setting procedure, just manually bring the tool where you want to place the XY-datum (0,0), and then execute the following program. This applies to the current coordinate system. So, for example, if you want to work in G56 WCS, first execute G56 in MDI mode to make it current.

    O8008 (CURR WCS XY-DATUM SETTING ON MILL M/C);
    #1 = #4014;
    #1 = #1 – 53;
    #1 = #1 * 20;
    #1 = #1 + 5201;
    #[#1] = #5021 - #5201;
    #[#1 + 1] = #5022 - #5202;
    M30;

  4. #4
    Join Date
    Mar 2007
    Posts
    122
    I would make sure you have the machine in absolute. There is usually and hard key on the MTB side or a soft key in the operators panel. Also there may be a keep relay that will allow the hard key to control ABS or the soft key.

  5. #5
    Join Date
    Sep 2006
    Posts
    29
    Quote Originally Posted by ben_heinman View Post
    I would make sure you have the machine in absolute. There is usually and hard key on the MTB side or a soft key in the operators panel. Also there may be a keep relay that will allow the hard key to control ABS or the soft key.
    I think this is the problem , machine is showing relative in the tool offsets and I cant find how to change it ??

  6. #6
    Join Date
    Mar 2006
    Posts
    167
    If it is one of the i series controls, it will most likely be set to use relative in tool offsets. This is the default, and is far more useful then setting it to absolute (can't remember parameter). Work offsets, however, should work from the machine position, and depending on the parameter setting, will either update current absolute position immediately, or next time work offset is called (default setting).

  7. #7
    Join Date
    Mar 2003
    Posts
    2932
    Quote Originally Posted by cdfracing View Post
    I think this is the problem , machine is showing relative in the tool offsets and I cant find how to change it ??
    As I said in my earlier post, make sure the RELATIVE and MACHINE positions agree before setting tool length offsets. I don't believe you can change which position display is used when setting tool length offsets... I haven't seen a parameter that changes this.

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