Rockwell Automation 8520 9/Series CNC Lathe - Manual (Page 639)

Drilling Cycles
Chapter 26
26-13
In the G83 drilling cycle, the control moves the axes in this 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 27.5. 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.
7. The cutting tool is then retracted at a rapid feedrate to the initial point
level as determined by G98.
When the single block function is active, the control stops axis motion
after steps 1, 2 and 7.
The format for the G83.1 cycle is:
G83.1X__Z__R__Q__P__F__L__;
Where : Is :
X specifies the location of the hole position in the selected plane.
Z defines the hole bottom.
R
defines the R point level.
Q defines the infeed amount for each step into the hole.
P defines the dwell period at hole bottom.
F defines the cutting feedrate.
L defines the number of times the drilling cycle is repeated.
See page 26-7 for a detailed description of these parameters.
Important: The programmer or operator must start spindle or live tool
rotation.
( G83.1): Deep Hole Peck
Drilling Cycle with Dwell