* indicates optional
It is not necessary to start the spindle CW before this canned cycle. The control does this automatically.
When G84 tapping on a lathe, it is simplest to use G99 Feed Per Revolution.
The Lead is the distance traveled along a screw's axis, with each full revolution.
The feedrate, when using G99, is equal to the Lead of the tap.
An S value must be called prior to the G84. The S value determines the RPM of the tapping cycle.
In Metric Mode ( G99, with Setting 9 = MM), the feedrate is the metric equivalent of the lead, in MM.
In Inch Mode ( G99, with Setting 9 = INCH), the feedrate is the Inch equivalent of the lead, in inches.
The lead (and G99 feedrate) of an M10 x 1.0mm tap is 1.0mm, or .03937" (1.0/25.4=.03937).
The lead of a 5/16-18 tap is 1.411 mm (1/18*25.4 = 1.411), or .0556" (1/18 = .0556)
This canned cycle can be used on the secondary spindle of a Dual Spindle DS lathe, when prefaced by a G14.
Refer to the G14 Secondary Spindle Swap for more information.
For Axial Live-Tool tapping, use a G95 or G186 command.
For Radial Live-Tool tapping, use a G195 or G196 command.
For Reverse Tapping (left-hand thread) on the Main or Secondary Spindle,
More programming examples, in both Inch and Metric, are shown below:G84 Tapping Canned Cycle:  Rapid,  Feed,  Start or end of stroke,  Starting plane, [R] R plane, [Z] Position at the bottom of the hole.