G Codes
we will be adding GCode definitions / explanations here. we will also put implementation specific notes here as needed. until then, please see the primer.
Some useful G-Codes are:
- G0 - Rapid Motion
- G1 - Coordinated Motion
- G2 - Arc - Clockwise
- G3 - Arc - Counter Clockwise
- G4 - Dwell
- G20 - Inches as units
- G21 - Millimeters as units
- G28 - Go Home
- G30 - Go Home via Intermediate Point
- G90 - Absolute Positioning
- G91 - Incremental Positioning
- G92 - Set current as home
G-Codes can have all kinds of arguments. Only a few of those are actually used here:
- X absolute position
- Y absolute position
- Z absolute position
- A position (rotary around X)
- B position (rotary around Y)
- C position (rotary around Z)
- U Relative axis parallel to X
- V Relative axis parallel to Y
- W Relative axis parallel to Z
- M code (another "action" register or Machine code(*)) (otherwise referred to as a "Miscellaneous" function")
- F feed rate
- S spindle speed
- N line number
- R Arc radius or optional word passed to a subprogram/canned cycle
- P Dwell time or optional word passed to a subprogram/canned cycle
- T Tool selection
- I Arc data X axis
- J Arc data Y axis.
- K Arc data Z axis, or optional word passed to a subprogram/canned cycle
- D Cutter diameter/radius offset
- H Tool length offset
