Here is another G81 drilling cycle programming example which illustrates the use of repeat drilling in G91 Incremental Programming Mode.
Other CNC program example is here G81 Drilling Cycle – Repeat Drilling in G91 Incremental Mode Example Code
Repeat Drilling with G81 Drilling Cycle
![Repeat Drilling with G81 Drilling Cycle and G91](http://www.helmancnc.com/wp-content/uploads/2013/02/Repeat-Drilling-with-G81-Drilling-Cycle-and-G91-Example-Program.jpg)
Repeat Drilling with G81 Drilling Cycle and G91
O1000 T1 M6 G00 G90 G40 G21 G17 G94 G54 X20 Y10 S1000 M03 G43 H1 Z100 Z3 G81 G99 R3 Z-20 F350 M08 G91 X10 Y10 K4 G80 G00 G90 Z100 M30