# cf. http://linuxcnc.org/docs/2.7/html/gcode.html
F:
  meaning: Set feed rate
# Motion (X Y Z A B C U V W apply to all motions)
G0:
  meaning: Rapid Move
G1:
  meaning: Linear Move
G23:
  meaning: Arc Move
  parameters: I J K or R, P
G3:
  meaning: Arc Move
  parameters: I J K or R, P
G4:
  meaning: Dwell
  parameters: P
G5:
  meaning: Cubic Spline
  parameters: I J P Q
G5.1:
  meaning: Quadratic Spline
  parameters: I J
G5.2:
  meaning: NURBS
  parameters: P L
G38.2:
  meaning: Straight Probe
G38.3:
  meaning: Straight Probe
G38.4:
  meaning: Straight Probe
G38.5:
  meaning: Straight Probe
G33:
  meaning: Spindle Synchronized Motion
  parameters: K
G33.1:
  meaning: Rigid Tapping
  parameters: K
G80:
  meaning: Cancel Canned Cycle
# Canned cycles (X Y Z or U V W apply to canned cycles, depending on active plane)
G81:
  meaning: Drilling Cycle
  parameters: R L (P)
G82:
  meaning: Drilling Cycle, Dwell
  parameters: R L (P)
G83:
  meaning: Drilling Cycle, Peck
  parameters: R L Q
G73:
  meaning: Drilling Cycle, Chip Breaking
  parameters: R L Q
G85:
  meaning: Boring Cycle, Feed Out
  parameters: R L (P)
G89:
  meaning: Boring Cycle, Dwell, Feed Out
  parameters: R L (P)
G76:
  meaning: Threading Cycle
  parameters: P Z I J R K Q H L E
# Distance Mode
G90:
  meaning: Distance Mode
G91:
  meaning: Distance Mode
G90.1:
  meaning: Arc Distance Mode
G91.1:
  meaning: Arc Distance Mode
G7:
  meaning: Lathe Diameter Mode
G8:
  meaning: Lathe Radius Mode
# Feed Rate Mode
G93:
  meaning: Feed Rate Mode
G94:
  meaning: Feed Rate Mode
G95:
  meaning: Feed Rate Mode
# Spindle Control
M3:
  meaning: Spindle Control
  parameters: S
M4:
  meaning: Spindle Control
  parameters: S
M5:
  meaning: Spindle Control
  parameters: S
M19:
  meaning: Orient Spindle
G96:
  meaning: Spindle Control Mode
  parameters: S D
G97:
  meaning: Spindle Control Mode
  parameters: S D
# Coolant
M7:
  meaning: Coolant Control
M8:
  meaning: Coolant Control
M9:
  meaning: Coolant Control
# Tool Length Offset
G43:
  meaning: Tool Length Offset
  parameters: H
G43.1:
  meaning: Dynamic Tool Length Offset
G43.2:
  meaning: Apply additional Tool Length Offset
  parameters: H
G49:
  meaning: Cancel Tool Length Compensation
# Stopping
M0:
  meaning: Program Pause
M1:
  meaning: Program Pause
M2:
  meaning: Program End
M30:
  meaning: Program End
M60:
  meaning: Pallet Change Pause
# Units
G20:
  meaning: Units (inch, mm)
G21:
  meaning: Units (inch, mm)
# Plane Selection: (affects G2, G3, G81…G89, G40…G42)
G17:
  meaning: Plane Select
G17.1:
  meaning: Plane Select
G18:
  meaning: Plane Select
G18.1:
  meaning: Plane Select
G19:
  meaning: Plane Select
G19.1:
  meaning: Plane Select
# Cutter Radius Compensation
G40:
  meaning: Compensation Off
G41:
  meaning: Cutter Compensation
  parameters: D
G42:
  meaning: Cutter Compensation
  parameters: D
G41.1:
  meaning: Dynamic Cutter Compensation
  parameters: D L
G42.1:
  meaning: Dynamic Cutter Compensation
  parameters: D L
# Path Control Mode
G61.1:
  meaning: Exact Path Mode
G61.1:
  meaning: Exact Path Mode
G64:
  meaning: Path Blending
  parameters: P Q
# Return Mode in Canned Cycles
G98:
  meaning: Canned Cycle Return Level
G99:
  meaning: Canned Cycle Return Level
# Other Modal Codes
F:
  meaning: Set Feed Rate
S:
  meaning: Set Spindle Speed
T:
  meaning: Select Tool)
M48, M49:
  meaning: Speed and Feed Override Control
M50:
  meaning: Feed Override Control
  parameters: P0 (off) or P1 (on)
M51:
  meaning: Spindle Speed Override Control
  parameters: P0 (off) or P1 (on)
M52:
  meaning: Adaptive Feed Control
  parameters: P0 (off) or P1 (on)
M53:
  meaning: Feed Stop Control
  parameters: P0 (off) or P1 (on)
G54-G59.3:
  meaning: Select Coordinate System
# Flow-control Codes
## o sub:
##   meaning: Subroutines, sub/endsub call
## o while:
##   meaning: Looping, while/endwhile do/while
## o if:
##   meaning: Conditional, if/else/endif
## o repeat:
##   meaning: Repeat a loop of code
## '[]':
##   meaning: Indirection
## o call:
##   meaning: Call named file
M70:
  meaning: Save modal state
M71:
  meaning: Invalidate stored state
M72:
  meaning: Restore modal state
M73:
  meaning: Save and Auto-restore modal state
# Input/Output Codes
M62:
  meaning: Digital Output Control
M63:
  meaning: Digital Output Control
M64:
  meaning: Digital Output Control
M65:
  meaning: Digital Output Control
  parameters: P
M66:
  meaning: Wait on Input
  parameters: P E L Q
M67:
  meaning: Analog Output,Synchronized
  parameters: T
M68:
  meaning: Analog Output, Immediate
  parameters: T
# Non-modal Codes
M6:
  meaning: Tool Change
  parameters: T
M61:
  meaning: Set Current Too
  l # Q
G10 L1:
  meaning: Set Tool Table
  parameters: P Q R
G10 L10:
  meaning: Set Tool Table
  parameters: P
G10 L11:
  meaning: Set Tool Table
  parameters: P
G10 L2:
  meaning: Set Coordinate System
  parameters: P R
G10 L20:
  meaning: Set Coordinate System
  parameters: P
G28:
  meaning: Go/Set Predefined Position
G28.1:
  meaning: Go/Set Predefined Position
G30:
  meaning: Go/Set Predefined Position
G30.1:
  meaning: Go/Set Predefined Position
G53:
  meaning: Move in Machine Coordinates
G92:
  meaning: Coordinate System Offset
G92.1:
  meaning: Reset G92 Offsets
G92.2:
  meaning: Reset G92 Offsets
G92.3:
  meaning: Restore G92 Offsets
M101 - M199: # Don't expand !
  meaning: User Defined Commands
  parameters: P Q
S:
  meaning: Set spindle speed
T:
  meaning: Select tool