Syntax & Parameters

G73 followed by axis, R, Q, K & F values.
X, Y, Z, A, B Value - specifies the axis you wish to move following the distance to move. The distance value will be the current machine units in use.
R Value - This is the retract position in the Z axis. This value must be specified.
Q Value - The Q value is peck (incremental) value. A positive non zero Q value must be specified.
K Value - This is number of time the cycle needs to be repeated.
F Value - The F value defines the feedrate at which the axis will move at.

Example program

N10 G99 G73 X10 Y10 Z-8 R2 Q1 F100
N20 X20
N30 X30

The first line moves the X & Y axis to 10mm position with retract plane set to 2mm, drilling to Z -8mm, peck of 1mm at 100 mm/minute feedrate and starts drilling.
The second line moves X axis to 20mm position and drill a hole as per the same values.
The third line moves X axis to 30mm position and drill a hole as per the same values.

INFORMATION: Units are defined as either inches or mm depending on your machines setup or G20 or G21 command in use.