Rockwell Automation 8520 9/Series CNC Lathe - Manual (Page 656)

Drilling Cycles
Chapter 26
26-30
The shift direction is determined by two possible methods:
Method I
This shift method is a single-axis shift. The direction and axis for the shift
is set in AMP by your system installer or can be altered using the drilling
cycle parameter table. See page 26-38.
the direction of the axis is specified as + or -.
the feedrate using this shift method is always rapid traverse.
the Q-word shift amount is always interpreted as a positive value; a
negative Q-word is not allowed.
Method II
The direction of the shift using this method is programmed in the boring
cycle block. Program a shift amount for axes in the current plane (G17,
G18, or G19) by using only these words:
I__ programs an X axis move.
K__ programs a Z axis move.
Follow the I- and K-words (modal during drilling cycles) with incremental
values in the block that programs the hole position.
When using Method II, remember:
if both axes in the current plane are to be shifted, specify both words to
move the axes
the generated move is a single linear move and executes at rapid
traverse
6. The boring tool is then retracted at a rapid feedrate to the initial point
level as determined by G98.
7. After reaching initial point level, the control again positions the
spindle or live tool at the bottom of the hole in a particular orientation
as determined by the system installer in AMP.
8. After reaching the initial point level, the boring tool is shifted back
(in a manner previously explained and illustrated) and the spindle or
live tool is re-started in the counterclockwise direction.
When the single block function is active, the control stops axis motion
after steps 1, 2, 4, and 8.