Rockwell Automation 8520 9/Series CNC Lathe - Manual (Page 856)

Allen-Bradley 7300 Series CNC
Tape Compatibility
Appendix D
D-6
CAUTION: The feedrate of any thread cutting pass is
lead-limited to 100 inches per minute (IPM). If the values of
the programmed thread lead and the currently active spindle
speed generate a feedrate that exceeds 100 IPM, the control
automatically reduces the value of the programmed thread lead
to limit the thread cutting feedrate at 100 IPM. The lead of the
resulting thread, therefore, is less than the programmed thread
lead.
Figure D.2 illustrates these parameters.
Figure D.2
G29 Multi-pass Thread Cutting Parameters
(Absolute/Increment Programming Mode)
Z inc. Z abs.
X
Z
I inc.
K inc. D inc.
L inc.