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O9010 (DRILLMACRO.NC1)
(G81 MACRO)
( Z is final drill depth )
( K is Depth per peck )
( R is Standoff amount from last depth ) 
( F is Feed rate )
( Drill retracts to whatever the Z value was before calling the G81 cycle )
#1=0
#2=0
IF[#23NE#0]GOTO1
IF[#26EQ#0]GOTO8
#23=#5002-#26
N1#1=#1+#6
IF[#1LE#23]GOTO2
#1=#23
N2G0W-#3
G1W-[#1-#3]F#9
G0W#1
IF[#1GE#23]GOTO9
#2=#1
#3=#2-#18
GOTO1
N9M99
N8#3000=1(NO Z OR W COMMAND)
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(PROGRAM EXAMPLE: )
(5/8" SPADE DRILL 8.0" FLUTE LENGTH) 
N58 G0 T0505 
N60 G50 S300 
N62 G97 S300 M3 
N64 G0 X0. Z.1 M8 
N66 G81 Z-5.322 K1.14 R.04 F.008
N68 G0 Z .1 
N70 G30 U0 W0 P2 M9 
N72 M30