CNC Lathe | G42 Code | Tool Nose Offset Example

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Technical Drawing

CNC Program

N1 X140. Z20. ;
N2 G00 S1700 M03 T0202 ;
N3 (G00) G42 X0 Z5. ; Nose R offset start-up block
N4 G01 Z0 F0.2;
N5 X20. ;
N6 Z–20. ;
N7 X30. W–15. S1100 ;
N8 G1 W–20. R3. ; (Rounding)
N9 G1 X50. K–3. S700 ; (Chamfering)
N10 G01 Z–70. ;
N11 G02 X90. Z–90. R20. S360 ; (Arc designated by R command)
N12 G01 X110. S300 ;
N13 G04 U0 ; (Dwell for making sharp edge)
N14 (G01) Z–110. ;
N15 X120. ;
N16 G00 X140. Z30. ;
N17 T0 G40 ; Nose R offset cancel block

G Codes Explanation

G00 Rapid traverse
G01 Linear interpolation
G02 Circular Interpolation CW
G04 Dwell
G40 and G42 Tool Nose Offset
G70 Contour Finishing
G71 Stock Removal in Turning


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