CNC Milling | G81 Cycle | Drilling Example

In this article, we write CNC program example for drilling with G81 cycle in CNC Milling machines.


Technical Drawing

CNC Milling | G81 Cycle | Drilling Example

CNC Program

N15 O0003;
N25 G54 G90;
N80 T02 M6; ( Guide Drill )
N82 G94;
N85 G00 X15 Y15;
N90 G43 G0 Z10. H2 M3;
N95 G99 G90 G81 X15. Y15. Z–6. R3. K1 F200;
N105 Y50;
N110 Y85;
N115 X85;
N120 Y50;
N125 Y15;
N128 G80;
N130 G28;
N135 M05 M09;
N140 T03 M6; ( ø8 Drill )
N145 G94 F300 S2000 M03;
N148 G43 G0 Z10. H3 M8;
N150 G99 G90 G81 X15. Y15. Z–31. R3. K1 F150;
N155 Y50;
N160 Y85;
N165 X85;
N170 Y50;
N175 Y15;
N178 G80;
N180 G28;
N185 M05 M30;

G Codes Explanation

G00 Rapid traverse
G01 Linear interpolation
G02 Circular interpolation CW
G03 Circular interpolation CCW
G28 Reference Point Return
G43 Tool Length Offset
G80 Canned Cycle Cancel
G81 Drilling
G90 Absolute command
G91 Increment command
G98 and G99 Return Point Level


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