Rockwell Automation 8520 9/Series CNC Lathe - Manual (Page 654)

Drilling Cycles
Chapter 26
26-28
In the G86 drilling cycle, the control moves the axis in this manner:
1. The tool rapids to the initial point level above the hole location.
2. The cutting tool then rapids to the R point level, slows to the
programmed cutting feedrate and begins the boring operation.
3. The cutting tool bores at the programmed feedrate until it reaches the
depth of the hole as programmed with the Z-word.
4. If the user has entered a value for the P parameter, the cutting tool
dwells after it reaches the bottom of the hole.
5. The spindle or live tool stops rotating.
6. The boring tool is then retracted at a rapid feedrate to the initial point
level, as determined by G98. Spindle or live tool rotation continues
forward.
When the single block function is active, the control stops axis motion
after steps 1, 2 and 6.
The format for the G86.1 cycle is:
G86.1X__Z__ I__K__ R__F__L__;
Q__
Where : Is :
X specifies location of the hole.
Z defines the hole bottom.
Q or I, K defines the tool shift amount.
R defines the R point level.
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.
(G86.1): Boring Cycle, Tool
Shift