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IndustryArena Forum > WoodWorking Machines > CNC Machining Centers > U & V address in CNC Programming
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  1. #1
    Join Date
    May 2009
    Posts
    393

    Question U & V address in CNC Programming

    Hi

    What do the U & V addresses refers to..

    I have 1 turning centre & it defines the incremental distance in the absolute mode...

    like....

    G90
    G00X0.0Y0.0.............An absolute position on the Part Zero
    G01U50.0..................Will move to X50.0 (In absolute terms)
    G01X100.0...............Here the tool will move 50mm from the previous location...

    Well thats what i interpretated about U,V & W.

    But on turning centre it works absoulte Ok,


    The problem is on Pinnacle machine (VMC) it shows an P22 alaram..what must be the thing....or is that so in machining centre, such U V & W are not configured.

    pLEASE CORRECT ME IF I AM MISSING SOMETHING....

  2. #2
    Join Date
    Dec 2003
    Posts
    24260
    Some older machines used U,V,W for an incremental or relative move of the X,Y,Z axis.
    Absolute move would use the X,Y,Z notation.
    Later machines use G90 G91 for Absolute and Incremental.
    You would have to refer to the control manufacturers literature to find out which is relevant.
    Al.
    CNC, Mechatronics Integration and Custom Machine Design

    “Logic will get you from A to B. Imagination will take you everywhere.”
    Albert E.

  3. #3
    Join Date
    May 2009
    Posts
    393
    Quote Originally Posted by Al_The_Man View Post
    Some older machines used U,V,W for an incremental or relative move of the X,Y,Z axis.
    Absolute move would use the X,Y,Z notation.
    Later machines use G90 G91 for Absolute and Incremental.
    You would have to refer to the control manufacturers literature to find out which is relevant.
    Al.

    K...........

    Thanks for that info.....

  4. #4
    Join Date
    Nov 2005
    Posts
    172
    On most turning centers I deal with the incremental commands are (U) for "X", (W) for "Z" and (H) for "C". The primary advantage from my perspective is when generating gode at the machine. It provides you a quick method of moving the machine (example - relieving a tool after a cut) without having to "do the math".
    These are also addresses within numerous canned and multiple repetitive cycles within many controls.
    Hope this helps.

    Mark T.

  5. #5
    Join Date
    May 2009
    Posts
    393
    Quote Originally Posted by MarkT View Post
    On most turning centers I deal with the incremental commands are (U) for "X", (W) for "Z" and (H) for "C". The primary advantage from my perspective is when generating gode at the machine. It provides you a quick method of moving the machine (example - relieving a tool after a cut) without having to "do the math".
    These are also addresses within numerous canned and multiple repetitive cycles within many controls.
    Hope this helps.

    Mark T.
    Ok....Mark....

    So is that so that U & W are used mostly on turning centre... Does they exist on a machining centre...???

    Sometimes i feel that that these Address used for axis defination are so confusing....For example, "U axis is a relative movement in a turning centre & the same U axis is a taper cutting axis on WireCut"....These Manufacturer have clubbed address so it hard for anybody to interpret it easily..............Well just wanted to express manufacturer's desire...........:drowning:

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