Owner's manual

Milling Fixed Cycles
Chapter 26
26-13
Where :
Is :
X specifieslocation ofthe hole.
Z definesthehole bottom.
R definestheR pointlevel.
F represents the thread leadalong the drillingaxis (Zin this manual). Itis
mandatoryand modal inany subsequentsolid tapping cycle blocksuntila new
F-word isprogrammed.
The controlinterpretstheF-word asthethread leadin inches perrevolutionor
millimetersperrevolution,depending ontheinch/metric modeactive.
L defines the numberoftimes the drillingcycle isrepeated.
Q
defines the angleatwhichtoorientthe spindle beforestarting the tap.Itismodal
inany subsequentsolid tapping blocks untila newQ-word is programmed orthe
tapping cycleis cancelled bya G80.To retapa hole,aQ-word musthavebeen
programmed whenthehole was originallytapped.
D
defines the return spindlespeed,butcannotexceed the maximumtapping
spindlespeed setin AMP. ThiswilladjustyourZ-axis feedrate accordingtothe
thread lead defined inF.
S
defines spindle speedin rpm.
See section 26.3 for a detailed description of these parameters.
Important: When programming and executing a G74.1 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
cycle stop is acknowledged throughout the cycle, but can be disabled by
G63
you can use active reset to abort the cycle after the cycle stop request
has been acknowledged