Fanuc G81 drilling cycle program

                            Fanuc G81 cycle is used for normal drilling . Cutting feed is performed to the bottom of hole , then tool is retracted from the bottom of the hole in rapid traverse. When a tool length compensation (G43, G44, or G49) is specified in the canned cycle for drilling, the
offset is applied after the time of positioning to point R.

G76 X_ Y_ Z_ R_ F_ K_ ;
                    Where , XY- Position of hole
                                  Z-  Depth of operation performe
                                  R-  R plane position.
                                  F- cutting feed rate 
                                  K- no of times operation repeats.

O5124

N10   M06 T06 ;

N20   G90 G80 G17 G00 G54 X0 Y0 ;

N30   G43 Z100 H4 ;

N40   M03 S1500 ;

N50   M07 ;

N60   G99 G81 X20 Y20 Z-45 R5 F120  ;      [A]

N70   X80 Y20 Z-45 ;                                     [B]

N80   X20 Y50 Z-45 ;                                     [C]

N90   X80 Y50 Z-45 ;                                     [D]

N100 G98 G80 G00 Z100 ;

N110 M05 M09 M30 ;

                                                                                More examples..........!!!!

DESCRIPTION OF PROGRAM 

N10- Tool change command , select tool no. 6
N20- Absolute co-ordinate command , cancel canned cycle command , selection of  XY plane, rapid command, work coordinate for tool positioning at  X0 and Y0.
N30- Tool height offset compensation command , where tool is 100 along Z axis , tool hight code H4.
N40- Spindle on clockwise , speed is 1500 rpm .
N50- Coolant ON .

N60- Return to R-plane in canned cycle , Drilling cycle command ,first position is X20 and Y20 Depth of drilling is 45 , R- plane distance is 5 ,feed rate per minute is 120 . [A]

N70- Tool moves second drilling position where X80 and Y20 and Z-45 . [B]

N80- Tool moves third drilling position where X20 and Y50 and Z-45 . [C]

N90- Tool moves fourth drilling position where X80 and Y50 and Z-45 . [D]

N100-Tool return initial position , cancel canned cycle , rapid command , where tool along Z axis is 100 .

N110-  Spindle off , coolant off, Main program end .