CNC Milling Program Tutorial: G01, G02, G03, G90, G91 Commands Explained

A cnc mill program for cnc machinists programmers, who have started to learning basic cnc programming techniques.

CNC Mill Example Program

CNC Program

N40 G90 G00 X0 Y0
N50 G01 X-10 Y-20 R8         (P1)
N60 G01 X-50 R10             (P2)
N70 Y10                      (P3)
N80 X-19.97 Y25.01           (P4)
N90 G03 X7.97 Y38.99 R18     (P5)
N100 G01 X30 Y50             (P6) 
N110 G91 X10.1 Y-10.1        (P7)
N120 G90 G02 X59.9 Y20.1 R14 (P8)
N130 G01 X70 Y10             (P9)
N140 Y-20 R10                (P10)
N150 X50                     (P11)
N160 G03 X30 R10             (P12)
N170 G01 X10 R8              (P13)
N180 X0 Y0

G M S T Codes Explanation

Code	Description
G00	Rapid traverse
G01	Linear interpolation
G02	Circular interpolation CW
G03	Circular interpolation CCW
G90	Absolute command
G91	Increment command

CNC Milling Program Example – Step-by-Step G‑Code Tutorial Fadal L93NN BHC Subroutine – Accurate Bolt Hole Circle Drilling

CNC Machine

Industrial robot

Industrial equipment