Manual

Drilling Cycles
Chapter 26
26-20
Use this cycle to cut right-handed threads.
The format for the G84.2 cycle is:
G84.2X__Z__R__F__L__Q__D__S__;
Where : Is :
X specifies location of thehole.
Z defines the holebottom.
R defines the Rpoint level.
F defines the threadlead alongthe drilling axis (Zin thismanual). It is mandatory
and modal in anysubsequent solid tappingcycle blocksuntil anew F-wordis
programmed.
The control interprets theF-word asthe threadlead ininches per revolutionor
millimeters perrevolution, depending onthe inch/metricmode active.
L defines the numberof times thedrilling cycleis repeated.
Q
defines theangle at whichto orient thespindle before starting the tap. It ismodal
in any subsequent solid tappingblocks untila newQ-word isprogrammed orthe
tapping cycle is cancelledby aG80. To retapa hole, aQ-word must have been
programmed when the hole was originallytapped.
D
defines thereturn spindlespeed, but cannot exceed themaximum tapping
spindle speed set in AMP. This will adjust yourZ-axis feedrateaccording tothe
thread lead defined in F.
S
defines spindlespeed inrpm.
See section 27.3 for a detailed description of these parameters.
Important: When programming and executing a G84.2 solid-tapping
cycle, remember:
the feedrate of the tapping phases is derived as
(spindle {RPM}
*
F-lead {IPR}) = IPM
the spindle speed that is active at the start of the cycle determines the
effective Z feedrate
the direction of spindle rotation for tap-in and tap-out phases will be
automatically generated by the control
spindle speed override has no effect on the solid-tapping cycle; you can
use feedrate override to adjust the tapping operation
D cannot exceed the maximum tapping spindle speed set in AMP
you cannot select tools via D-word while in solid-tapping mode
gear changes are locked out
(G84.2): Right-Hand
Solid-Tapping Cycle