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IndustryArena Forum > Machine Controllers Software and Solutions > Fanuc > fanuc 21i-m parameter to change mdi from incremental to absolute
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  1. #1
    Join Date
    Jan 2007
    Posts
    61

    fanuc 21i-m parameter to change mdi from incremental to absolute

    Wondering if anyone can help when in mdi I want to move to my workoffsett but machine reads in incremental in mdi not absolute?

  2. #2
    Join Date
    Nov 2010
    Posts
    89

    Re: fanuc 21i-m parameter to change mdi from incremental to absolute

    G90 change it to absolute and G91 to incremental. So G90 G54 should move it in absolute to your work offset.

  3. #3
    Join Date
    Jan 2007
    Posts
    61

    Re: fanuc 21i-m parameter to change mdi from incremental to absolute

    G90 Doesn't work in mdi so I think its a parameter

  4. #4
    Join Date
    Mar 2003
    Posts
    2932

    Re: fanuc 21i-m parameter to change mdi from incremental to absolute

    3401 bits 4 (MAB) and 5 (ABS)

    MAB Switching between the absolute and incremental commands in MDI
    operation
    0 : Performed by G90 or G91
    1 : Depending on the setting of bit 5 (ABS) of parameter No.3401
    ABS Program command in MDI operation
    0 : Assumed as an incremental command
    1 : Assumed as an absolute command

  5. #5
    Join Date
    Jan 2007
    Posts
    61

    Re: fanuc 21i-m parameter to change mdi from incremental to absolute

    ok so changed the parameter it works but now there is no points in numbers on tool length and work offsets?

  6. #6
    Join Date
    Mar 2003
    Posts
    2932

    Re: fanuc 21i-m parameter to change mdi from incremental to absolute

    Quote Originally Posted by binzer View Post
    ok so changed the parameter it works but now there is no points in numbers on tool length and work offsets?
    3401.4 & 5 are identical in 21iM-A and 21iM-B they should have no effect on the decimal point display in the offset pages. Did you change any other parameters?

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