Code	Group	Meaning	Parameters	Additional Parameters	Notes
G4	0	Dwell	P: dwell time in milliseconds
G10	0	Programmable data input (Data Setting)	L12: set cutter radius P: tool number (1 to 10) R: cutter radius (abs/inc)
G52	0	Local coordinate system setting	XYZ: origin
G0	1	Non-Linear Rapid moves	XYZ: position (abs/inc)
G1	1	Linear Interpolation
G2	1	CW Interpolation	XYZ: position (abs/inc) IJK: arc center (relative) -or- R: arc radius		effected by selected plane (G17/18/19)
G3	1	CCW Interpolation
G17	2	XY Plane of Interpolation			effects G2 & G3 (Arcs) effects G16 (Polar) effects G51 (Scaling) effects G68 (Rotation) CRC and fixed cycles in XY plane only
G18	2	XZ Plane of Interpolation
G19	2	YZ Plane of Interpolation
G90	3	Absolute Programming mode			parameters effected are marked as (abs/inc)
G91	3	Incremental Programming mode
G20	6	English Units			default mode
G21	6	Metric Units			simple scaling only
G40	7	Cutter Radius Compensation (CRC) cancel			only supported in XY plane
G41	7	Cutter Radius Compensation (CRC) left	D: tool number (0 to 10); if omitted uses current tool (T)
G42	7	Cutter Radius Compensation (CRC) right
G80	9	Fixed cycle cancel
G81	9	Drilling cycle	XY: position (abs/inc) Z: drill depth L: repetitions (0 or more); 1 if omitted R: retract height		fixed cycles only supported in XY plane effected by Retract Mode (G98/99)
G82	9	Spot-drilling cycle		P: dwell time in milliseconds
G83	9	Peck Drilling Cycle (deep hole)		Q: peck depth
G73	9	High speed peck drilling cycle
G85	9	Boring cycle
G89	9	Boring cycle, w/ dwell		P: dwell time in milliseconds
G100	9	Facing	XYZ: position (abs/inc) IJK: increments
G98	10	Return to initial Z level in a fixed cycle			effects fixed cycles (G81/82/83/73/85/89)
G99	10	Return to R level in a fixed cycle
G50	11	Scaling function cancel
G51	11	Scaling function	IJK: center point P: scaling factor (abs/inc)		effected by plane (G17/18/19) scaling occurs before rotation
G64	13	Cutting mode			default and only cutting mode; accepted but ignored
G68	16	Rotation Function	XYZ: center of rotation R: rotation in degrees (abs/inc)		rotation in selected plane (G17/18/19) rotation occurs after scaling
G69	16	Rotation Function cancel
G15	18	Polar Coordinate Command cancel
G16	18	Polar Coordinate Command			effected by plane (G17/18/19)
M6		Tool change			selects tool from previous T setting
M0		Program stop			single-step will continue program
M1		Optional stop			stop if Optional Stop switch set single-step will continue program
M2		Program end			full stop of program
M21		Mirror along X axis			can be combined with Y axis
M22		Mirror along Y axis			can be combined with X axis
M23		Mirror image cancel			cancels both axes
M30		Program end (reset/tape rewind)			full stop of program (same as M2)
M98		Subprogram call	P: subprogram number L: repetitions; 1 if omitted
M99		Return from Subprogram
D		Tool Number for CRC (G41/42)
F		IPM Feedrate (independent)
I,J,K		Arc center location (G2/3) Scaling center (G51)
L		Cycle repetitions (G81/82/83/73/85/89) Subprogram repetitions (M98) Data setting index (G10)
N		Block sequence numbers (independent)			allowed, but totally ignored
O		Subprogram label numbers			1 to 99999; referenced using P by Subprogram call (M98)
P		Dwell time (G4/G82/G89) Subprogram call number (M98) Scaling factor (G51)
Q		Peck Depth (G83/G73)
R		Arc center radius (G2/3) Fixed cycle retract level (G81/82/83/73/85/89) Data setting cutter radius (G10) Rotation angle (G68)
T		Tool number			set value used by Tool Change (M6)
X,Y,Z		XYZ position (G0/1/2/3) Local origin (G52) Rotation center (G68) XY position Z depth (G81/82/83/73/85/89)
/		Block Skip			entire block is skipped if Block Skip switch is on must be first non-blank character on line
!		text to end-of-line is a VBScript statement to be executed after block completes
[ ]		contained text is a VBScript expression evaluated as a word value			expressions not supported for G, M, N or O words