Rockwell Automation 8520 9/Series CNC Lathe - Manual (Page 642)

Drilling Cycles
Chapter 26
26-16
Figure 26.8
G84: Right-Hand Tapping Cycle
Initial point
level
7 6
Spindle or live tool rotation
in the forward direction
5
Hole bottom
Spindle or live tool rotation
direction reversed at hole
bottom
4
Z 3 R 2
1
R point level
Cutting feed
Rapid feed
In the G84 right-hand tapping cycle, the control moves the axes in this
manner:
CAUTION: The programmer or operator must set the direction
of spindle rotation for tap-in. The control forces the proper
spindle direction for the tap-out, but uses the programmed
spindle direction for the tap-in.
1. The tool rapids to initial point level above the hole location.
2. The threading tool then rapids to the R point level, slows to the
programmed cutting feedrate and begins the tapping operation.
3. During the tapping operation, the control infeeds the threading tool to
the depth and at the feedrate programmed in the tapping cycle.