Rockwell Automation 8520 9/Series CNC Lathe - Manual (Page 640)

Drilling Cycles
Chapter 26
26-14
Figure 26.7
G83.1: Deep Hole Peck Drilling Cycle with Dwell
R point level
Hole bottom
Initial point
level
Moves to hole bottom when Q is
larger than remaining depth
7
d
d
4
6
Q
Q 3 R
2
1
5
In the G83.1 peck drilling cycle, the control moves the axes in this manner:
1. The tool rapids to the initial point level above the hole location.
2. The drilling tool then rapids to the R point level, slows to the
programmed cutting feedrate and begins the drilling operation.
3. During the drilling operation, the control infeeds the drilling tool by
an amount Q, as programmed in the drilling cycle.
4. If a value was programmed for the P parameter, the drilling tool
dwells after it reaches the bottom of the hole.
5. It then retracts by an amount d at a rapid feedrate. The amount d is
specified by the system installer, or can be set by the operator as
described on page 26-38. This intermittent feed simplifies chip
disposal and permits a very small retraction amount to be set in peck
drilling.