ESAB Cutting Systems
CROSSBOW Page 121
4.27.7 G-Codes
The motion codes are used to define programmed motions of the machine. When entering actual
program dimension values, the plus sign (+) is optional. The control will assume all values to be positive
unless a negative sign (-) is present.
G92 – Absolute Zero Point
Defines the position of the absolute zero point for absolute programming mode. This code allows the
user to define the zero point anywhere in the coordinate system. If no X or Y value is included, then the
control assumes that the current machine position is the absolute zero point. Otherwise, the value
programmed for X and Y is taken as the distance that the machine is currently offset from the absolute
zero point. Those values are loaded into the control's Program Coordinates register, and all absolute
programming movements are referenced to the new zero point.
FORMAT: G92 Xn Yn
G90 – Absolute Programming Mode
Informs the control that all programmed dimensions are absolute coordinates, referenced from an
absolute zero point. When used, this code must appear at the beginning of the program.
FORMAT: G90
EXAMPLE: G92 X0 Y0 // Set absolute zero point
G90 // Select absolute programming mode
G00 X12.0 Y0.0 // Rapid positioning move to point 12.0, 0.0
G01 X12.0 Y10.0 // Linear motion at cut speed to point 12.0, 10.0
G91 – Incremental Programming Mode
Informs the control that all programmed dimensions are relative distances, referenced from the start of
each block. When used, this code must appear at the beginning of the program.
FORMAT: G91
EXAMPLE: G92 X0 Y0 // Set absolute zero point
G91 // Select incremental programming mode
G00 X12.0 Y0.0 // Rapid positioning move to point 12.0, 0.0
G01 Y10.0 // Linear motion at cut speed to point 12.0, 10.0
G20 – Inch Mode
Informs the control that all programmed dimensions are in inches. When used, this code must appear at
the beginning of the program.
G21 – Metric Mode
Informs the control that all programmed dimensions are in mm. When used, this code should appear at
the beginning of the program.
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