G81 – Drilling Cycle

This command is Canned Cycle used for drilling cycle.

Syntax & Parameters

• G81 followed by axis, R & F value.

• 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.

• F Value - The F value defines the feedrate at which the axis will move at.

Example program

N10 G99 G81 X10 Y10 Z-8 R2 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 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.