G Code - Tool Positioning


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  1. #1
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    Default G Code - Tool Positioning

    Hey guys


    If anyone can help. I have a question which states "You must move the cutting tool towards the piece. The tool must be positioned from the zero of the piece at Z = 5 mm and X = 26 mm".

    Do I use after the N block G00? also its absolute coordinates...

    Any help appreciated

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    Default Re: G Code - Tool Positioning

    Hi, the machine has a home zero position X0 Y0 Z0 that is at the bottom left corner of the table on a mill.....that is, with the table all the way to the right side and all the way to the column and with the heads all the way to the top of the column.

    The work position, or G54, is relative to this home zero position and could be set to zero on the left side and face of a vice for example or the start point on a job.

    The tool Z zero is set separately at zero for the particular tool you are going to use and is set in your tool register as tool number 1 etc.

    Positioning moves from the home zero to the G54 start point are usually done in a fast traverse or G00 move.

    So....assuming you previously have a G54 work zero position set......

    N50 G00 X26 Z5......will position the spindle (actually move the table) from that G54 zero position 26 inches to the right, as it's a plus movement, and the tool point will be 5 inches above it's Z zero setting as it's a plus move too........this is relative to your job size and height for a setting to start cutting

    The next move(s) would probably be a G01 feed move etc for whatever is planned next.
    Ian..



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    Default Re: G Code - Tool Positioning

    It is important to ensure that the offset setting is correct. It must be checked before executing the program.
    If it is lathe, execute G54 T0101 in the MDI mode, then manually bring the tool to a known position and see if the displayed coordinates are as expected.
    Since G54 is the default, you may skip this code.
    If it is milling machine, command G43 H01 in MDI, and check the coordinates at a known position.
    I am assuming that tool 1 with offset number 1 is being used.



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G Code - Tool Positioning

G Code - Tool Positioning