The following is a programming example to tap six ¼-20 holes ¾” deep @ 1600 RPM, utilizing 2:1 reverse ratio. This is standard line-by-line programming, with a subroutine used as a tapping cycle.

%
O0006
L100 ( subroutine for tap )
N1 G8 M49 ( G8 = no feed ramps. M49 = feed rate & RPM potentiometers are inactive )
N2 G1 Z-.750 F80.
N3 Z.3 F160. ( double the retract feed rate for 2:1 reverse ratio )
N4 G9 M48 ( G9 = feed ramps active. M48 = potentiometers active )
N5 G0
N6 M17 ( M17 = end of subroutine )
N7 M30 ( M30 = end of all subroutines )
N8 T3 M6 (1/4-20 TAP)
N9 G0 X0 Y0 S1600 M3
N10 H3 Z.3 M7
N11 L101
N12 X.750
N13 L101
N14 X1.5
N15 L101
N16 X2.250
N17 L101
N18 X3.
N19 L101
N20 X3.750
N21 L101
N22 T4 M6 (NEXT TOOL)
N23

The following is a programming example to tap six ¼-20 holes ¾” deep @ 1600 RPM, utilizing 2:1 reverse ratio. This is standard line-by-line programming.

%
O0006
N1 T3 M6 (1/4-20 TAP)
N2 G0 X0 Y0 S1600 M3
N3 H3 Z.3 M7
N4 G8 M49 ( G8 = no feed ramps. M49 = feed rate & RPM potentiometers are inactive )
N5 G1 Z-.750 F80.
N6 Z.3 F160.
N7 G0 X.750
N8 G1 Z-.750 F80.
N9 Z.3 F160.
N10 G0 X1.5
N12 G1 Z-.750 F80.
N13 Z.3 F160.
N14 G0 X2.250
N15 G1 Z-.750 F80.
N16 Z.3 F160.
N17 G0 X3.
N18 G1 Z-.750 F80.
N19 Z.3 F160.
N20 G0 X3.750
N21 G1 Z-.750 F80.
N22 Z.3 F160.
N23 G9 M48 ( G9 = feed ramps active. M48 = potentiometers active )
N24 T4 M6 (NEXT TOOL)
N25

The following is a programming example to tap six ¼-20 holes ¾” deep @ 1600 RPM, utilizing 2:1 reverse ratio. Programming example for a FADAL – VMC

Notes: When using high range on spindle speed, the “F” code on the G75 line must also use “.2 ”. Feed rate and spindle speed potentiometers are inactive during G75 Cycle.

O0006
N1 T3 M6 ( 1/4-20 TAP )
N2 G0 X0 Y0 S1600.2 M3
N3 H3 Z.3 M7
N4 G8 ( G8 = no feed ramps )
N5 G75 G98 R0.3 Z-.750 F1600.2 Q.050 P100 ( P100 = double retract feed rate )
N6 X.750
N7 X1.5
N8 X2.250
N9 X3.
N10 X3.750
N11 G80 G9 ( G9 = feed ramps active )
N12 T4 M6 (NEXT TOOL)
N13