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G2-G3: Arc or Circle Move

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  • Описание
    G2 adds a clockwise arc move to the planner; G3 adds a counter-clockwise arc. An arc move starts at the current position and ends at the given XYZ, pivoting around a center-point offset given by I and J or R.

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    allows G2/G3 to operate in the selected XY, ZX, or YZ workspace plane.
    This command has two forms:
    I J Form
    • I specifies an X offset. J specifies a Y offset.
    • At least one of the I J parameters is required.
    • X and Y can be omitted to do a complete circle.
    • The given X Y is not error-checked. The arc ends based on the angle of the destination.
    • Mixing I or J with R will throw an error.
    R Form
    • R specifies the radius. X or Y is required.
    • Omitting both X and Y will throw an error.
    • X or Y must differ from the current XY position.
    • Mixing R with I or J will throw an error.
    Arc moves actually generate several short straight-line moves, the length of which are determined by the configuration option MM_PER_ARC_SEGMENT (default 1mm). Any change in the Z position is linearly interpolated over the whole arc.
    ‘ARC_P_CIRCLES’ enables the use of the ‘P’ parameter to specify complete circles
    Использование
    G2 [E<pos>] I<offset> J<offset> [P<rate>] R<radius> [X<pos>] [Y<pos>] [Z<pos>]
    Параметры
    [E<pos>]
    The amount to extrude between the start point and end point
    I<offset>
    An offset from the current X position to use as the arc center
    J<offset>
    An offset from the current Y position to use as the arc center
    [P<rate>]
    Specify complete circles - requires ARC_P_CIRCLES
    R<radius>
    A radius from the current XY position to use as the arc center
    [X<pos>]
    A coordinate on the X axis
    [Y<pos>]
    A coordinate on the Y axis
    [Z<pos>]
    A coordinate on the Z axis
    Gallery
    G3 command geometry
    This illustrates a counter clockwise arc, starting at [9, 6]. It can be generated either by G3 X2 Y7 I-4 J-3 or G3 X2 Y7 R5
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    Примеры
    Move in a clockwise arc from the current position to [125, 32] with the center offset from the current position by (10.5, 10.5).
    G2 X125 Y32 I10.5 J10.5
    Move in a counter-clockwise arc from the current position to [125, 32] with the center offset from the current position by (10.5, 10.5).
    G3 X125 Y32 I10.5 J10.5
    Move in a complete clockwise circle with the center offset from the current position by [20, 20].
    G2 I20 J20
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