Rockwell Automation 8520 9/Series CNC Lathe - Manual (Page 659)

Drilling Cycles
Chapter 26
26-33
Method I
This shift method is a single axis shift. The direction and axis for the
shift is set in AMP by the 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 the programmed feedrate
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 only (G17, G18, G19) by using 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:
When using Method II, remember:
if both axes in the current plane are to be shifted, specify both
words to move the axes
the move generated is a single linear move and is executed at rapid
traverse
3. The back boring tool moves at a rapid feedrate through the existing
hole to the depth designated by the R-word.
4. Once the designated depth is reached, the back boring tool shifts the
same distance but in the opposite direction as the previous shift (the
shift made in step 2).
After this shift, the programmer or operator must start the spindle or
live tool. The spindle or live tool must rotate in the clockwise
direction.
5. The control retracts the back boring tool at the cutting feedrate to a
level specified by the Z-word.