Rockwell Automation 8520 9/Series CNC Lathe - Manual (Page 644)

Drilling Cycles
Chapter 26
26-18
Important: When programming a G84 tapping cycle, remember:
the programmer or operator must start spindle or live tool rotation
override usage - the control ignores the feedrate override switch and
clamps override at 100 percent
during tapping, the feedrate override switch and the feedhold feature are
both disabled; cycle stop is not acknowledged until the end of the return
operation
Figure 26.9
G84.1: Left-Hand Tapping Cycle
1
R point level
Initial point
level
Spindle or live tool rotation direction
is reversed at hole bottom
2 3
44
5
6
7
R
Z
Cutting feed
Rapid feed
In the G84.1 left-hand tapping cycle, the control moves the axes in this
manner: