CNC machines work by following the commands or instructions (G-codes / M-codes) which are given in Part Program. Here are G-codes for Fanuc cnc control which are necessary for a cnc machinists to learn to understand cnc programming.
Fanuc G-Code List (Lathe)
| G code | Description |
|---|---|
| G00 | Rapid traverse |
| G01 | Linear interpolation |
| G02 | Circular interpolation CW |
| G03 | Circular interpolation CCW |
| G04 | Dwell |
| G09 | Exact stop |
| G10 | Programmable data input |
| G20 | Input in inch |
| G21 | Input in mm |
| G22 | Stored stroke check function on |
| G23 | Stored stroke check function off |
| G27 | Reference position return check |
| G28 | Return to reference position |
| G32 | Thread cutting |
| G40 | Tool nose radius compensation cancel |
| G41 | Tool nose radius compensation left |
| G42 | Tool nose radius compensation right |
| G70 | Finish machining cycle |
| G71 | Turning cycle |
| G72 | Facing cycle |
| G73 | Pattern repeating cycle |
| G74 | Peck drilling cycle |
| G75 | Grooving cycle |
| G76 | Threading cycle |
| G92 | Coordinate system setting or max. spindle speed setting |
| G94 | Feed Per Minute |
| G95 | Feed Per Revolution |
| G96 | Constant surface speed control |
| G97 | Constant surface speed control cancel |
Fanuc G-Code List (Mill)
| G code | Description |
|---|---|
| G00 | Rapid traverse |
| G01 | Linear interpolation |
| G02 | Circular interpolation CW |
| G03 | Circular interpolation CCW |
| G04 | Dwell |
| G17 | X Y plane selection |
| G18 | Z X plane selection |
| G19 | Y Z plane selection |
| G28 | Return to reference position |
| G30 | 2nd, 3rd and 4th reference position return |
| G40 | Cutter compensation cancel |
| G41 | Cutter compensation left |
| G42 | Cutter compensation right |
| G43 | Tool length compensation + direction |
| G44 | Tool length compensation – direction |
| G49 | Tool length compensation cancel |
| G53 | Machine coordinate system selection |
| G54 | Workpiece coordinate system 1 selection |
| G55 | Workpiece coordinate system 2 selection |
| G56 | Workpiece coordinate system 3 selection |
| G57 | Workpiece coordinate system 4 selection |
| G58 | Workpiece coordinate system 5 selection |
| G59 | Workpiece coordinate system 6 selection |
| G68 | Coordinate rotation |
| G69 | Coordinate rotation cancel |
| G73 | Peck drilling cycle |
| G74 | Left-spiral cutting circle |
| G76 | Fine boring cycle |
| G80 | Canned cycle cancel |
| G81 | Drilling cycle, spot boring cycle |
| G82 | Drilling cycle or counter boring cycle |
| G83 | Peck drilling cycle |
| G84 | Tapping cycle |
| G85 | Boring cycle |
| G86 | Boring cycle |
| G87 | Back boring cycle |
| G88 | Boring cycle |
| G89 | Boring cycle |
| G90 | Absolute command |
| G91 | Increment command |
| G92 | Setting for work coordinate system or clamp at maximum spindle speed |
| G98 | Return to initial point in canned cycle |
| G99 | Return to R point in canned cycle |
