Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set - Manual (Page 654)

Milling Fixed Cycles
Chapter 26
26-22
Figure 26.10
G83: Deep Hole Drilling Cycle
initial point
level
R point level
Hole bottom
Moves to hole bottom
when Q is larger than
remaining depth
R
Q
Q
d
d
Q
d
1
2
3
4
5
6
7
In the G83 drilling cycle, the control moves the axes in the following
manner:
1. The tool rapids to 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 deep hole drilling
operation.
3. During the drilling operation, the control infeeds the drilling tool by
an amount Q, as programmed in the G83 block.
4. The drilling tool retracts at a rapid feedrate to the R point level.
5. The control feeds the drilling tool at rapid feedrate to a distance d
above the level drilled in the previous infeed. The amount d is
specified by the system installer, or can be set by the operator as
described in section 26.5. This intermittent feed simplifies chip
disposal and permits a very small retraction amount to be set in deep
hole drilling.
6. The drilling tool slows to the cutting feedrate again and infeeds an
amount Q + d.