Rockwell Automation 8520 9/Series CNC Lathe - Manual (Page 622)

Thread Cutting
Chapter 25
25-22
If a straight thread is desired:
enter a value of zero for this parameter
or
do not program the I-word in the block
The control performs threading in either radius or diameter mode. Be
aware that X values entered as a radius or a diameter value when entered.
Z, I, K, and D, parameters are always entered as radius values regardless of
the current mode. X and Z may also be programmed as incremental or
absolute values. K, D, and I are always programmed as incremental values
regardless of the current mode.
Figure 25.14 illustrates these parameters.
Figure 25.14
Multipass Thread Cutting Parameters
Z inc. Z abs.
X
Z
X abs.
X inc.
I
Pullout angle
K
D
Finishing
allowance
A
1/E or 1/F