G-Code & M-Code Reference

Rapid positioning — moves tool at maximum traverse speed to target coordinates (non-cutting move)

Linear interpolation — controlled feed-rate straight-line cutting move

Circular interpolation clockwise (CW arc) — requires I/J/K or R

Circular interpolation counter-clockwise (CCW arc) — requires I/J/K or R

Dwell — pause for a specified time (P = seconds or milliseconds depending on control)

High-speed machining mode (control-specific, e.g. AICC on Fanuc)

AI contour control / nano smoothing for high-speed finishing

Exact stop check — decelerates to zero at end of block before next move

Programmable data input — set offsets, parameters, and work coordinates from the program

Cancel programmable data input mode

XY plane selection — default plane for arcs and canned cycles (milling)

XZ plane selection — used for turning or side-milling arcs

YZ plane selection — used for arcs in the YZ plane

Programming in inches (imperial)

Programming in millimeters (metric)

Reference point return check — verifies machine is at home

Return to machine home position via optional intermediate point

Return from reference point — moves from G28 intermediate point to specified position

Return to 2nd/3rd/4th reference point (P2, P3, P4)

Skip function (touch probe feed) — feeds until signal triggers, records position

Cancel cutter radius compensation

Cutter compensation left — tool offsets left of programmed path

Cutter compensation left (D value input directly)

Cutter compensation right — tool offsets right of programmed path

Cutter compensation right (D value input directly)

Tool length compensation positive direction (H offset)

Dynamic tool length compensation

Tool length compensation negative direction

Cancel tool length compensation

Local coordinate system setting (temporary shift)

Machine coordinate system — moves in absolute machine coordinates (non-modal)

Work coordinate system 1 — most commonly used fixture offset

Work coordinate system 2

Work coordinate system 3

Work coordinate system 4

Work coordinate system 5

Work coordinate system 6

Additional work coordinate systems P1–P48 (extended offsets)

High-speed peck drilling cycle — shallow pecks with partial retract for chip breaking

Left-hand (reverse) tapping cycle — CCW tap with CW retract

Fine boring cycle — orients spindle, shifts, and retracts to avoid drag mark

Cancel canned cycle — returns to normal drilling/boring mode

Standard drilling cycle — drill to depth, rapid retract (no dwell)

Spot drilling / counterboring cycle — drill to depth with dwell at bottom

Deep-hole peck drilling cycle — full retract pecks to clear chips

Right-hand tapping cycle — CW tap with CCW retract (rigid or floating)

Rigid tapping cycle (synchronous spindle/feed)

Boring cycle — feed in, feed out (smooth finish both ways)

Boring cycle — feed in, spindle stop, rapid retract

Back boring cycle — approach from back side of workpiece

Boring cycle — feed in, dwell, manual retract (spindle on)

Boring cycle — feed in, dwell, feed out

Absolute positioning mode — all coordinates measured from work zero

Absolute arc center mode (I/J/K are absolute)

Incremental positioning mode — coordinates relative to current position

Incremental arc center mode (I/J/K are incremental) — default on most controls

Work coordinate position register (legacy offset shift)

Cancel G92 offset

Inverse time feed rate mode — F value = 1/time in minutes

Feed per minute mode (default for milling)

Feed per revolution mode (common in turning)

Constant surface speed (CSS) — spindle RPM varies with diameter (turning)

Constant RPM mode — fixed spindle speed (cancel CSS)

Canned cycle return to initial point (R-level)

Canned cycle return to R-point (rapid retract to R level only)

Thread cutting — single-pass threading (lathe)

Constant-pitch threading (single pass per block)

Variable-pitch (increasing lead) threading

Variable-pitch (decreasing lead) threading

Automatic tool compensation X (turning)

Automatic tool compensation Z (turning)

Set coordinate / max spindle speed clamp (turning)

Finishing cycle — finishes profile defined by G71/G72 rough pass (turning)

Longitudinal (OD/ID) rough turning cycle — removes material in passes along Z

Facing rough turning cycle — removes material in passes along X

OD/ID grooving cycle (turning)

Multi-pass threading cycle — automatic multi-pass thread cutting (turning)

OD/ID threading cycle (canned, turning)

Single-pass threading cycle (turning)

Circular pocket milling CW (Haas/Fanuc)

Circular pocket milling CCW (Haas/Fanuc)

Cancel polar coordinate command

Polar coordinate command — program in radius and angle

Tool position compensation (turning nose radius)

Engraving cycle (Haas) — cut text characters on workpiece

Cancel mirror image

Scaling function on — scale programmed path by factor

Mirror image on

Exact stop mode — decelerates to zero at every block end

Normal cutting mode / continuous path mode (cancel exact stop)

Macro call — call a custom macro subprogram with arguments

Macro modal call — macro repeats every block until cancelled

Cancel macro modal call

Coordinate rotation on — rotate coordinate system by angle

Cancel coordinate rotation

Disable mirror image (Haas)

Enable mirror image (Haas)

Block lookahead limit — limits number of buffered blocks

Cylindrical mapping — wraps XY onto rotary axis (4th axis engraving)

XY to XC polar interpolation mode (turning with live tooling)

Cancel polar interpolation

Cancel Y-axis mode (mill-turn)

Enable Y-axis mode (mill-turn)

Additional work offsets P1–P99 (Haas)

Surface finish accuracy control (Haas) — rough/medium/finish