Anaheim DPJ72LC3, DPJ72LC2 manual G90 Absolute Positioning Mode, G91 Incremental Positioning Mode

		Section 4 System Programming 59
Example:
G01	X1.0 Y3.0 Z-1.5 F12 Moves the tool directly to the Program
		coordinate X=1.0, Y=3.0, Z=-1.5.
G52	X3 Y-7 Z0	Activates a local coordinate system with
		origin at X=3, Y=-7, Z=0 relative to
		Program Zero. The machine tool does not
		move.
G01	X1.0 Y10.0 Z2.0	Moves the tool directly to the point X=1.0,
		Y=10.0, Z=2.0 relative to the local
		coordinate system as defined by the G52
		command above.
G52	X0 Y0 Z0	Cancels use of the local coordinate system.
		All absolute moves are again relative to
		Program Zero as you set it before running
		the program.

G90 Absolute Positioning Mode

The G90 command puts the system into absolute positioning mode. All XYZ coordinates are treated as points relative to Program Zero (or a local coordinate system set by the G52 command). This command stays in effect until a G91 command occurs.

Note that absolute positioning is the default positioning mode for LC. It is not necessary to include this command in your G-code file if all your moves are absolute.

G91 Incremental Positioning Mode

The G91 command puts the system into incremental positioning mode. All XYZ coordinates are treated as incremental move distances. This command stays in effect until a G90 command occurs.

Example:
G01	X1.0 Y3.0 Z-1.5 F12 Moves the tool directly to the Program
		coordinate X=1.0, Y=3.0, Z=-1.5. G90 is
		assumed.
G91		All XYZ coordinates after this command
		will be interpreted as incremental distances.
G01	X1.0 Y2.0 Z-0.5	Moves the tool a distance of X=1.0, Y=2.0,
		Z=-0.5 from the current tool location. This
		corresponds to the Program coordinate
		X=2.0, Y=5.0 Z=-2.0.