Rockwell Automation 8520-ARM2 9/Series CNC AMP Reference Manual Documentation Set - Manual (Page 647)

Miscellaneous Parameters
Chapter 37
37-7
Function
This is a lathe or grinder control parameter. It determines the units that
are used for the thread lead when programming an E- or F-word in a
threading block. This parameter is set for all threading blocks.
Use this parameter with these G-codes:
G-Code System
Lathe Grinder
Description A B C Surface Cylindrical
Single Pass G32 G33 G33 G33 G33
Variable Lead Single Pass G34 G34 G34 G34 G34
Single Pass Cycle G92 G78 G21 — —
Multi-Pass Cycle G76 G76 G78 — —
Inch/Rev -- When this parameter is set as Inch/Rev, the control reads an E-
or F-word in a threading cycle block as the number of inches the axes
travels per revolution of the spindle.
Num of Threads/Inch -- When this parameter is set as Num of
Threads/Inch, the control reads an E- or F-word in a threading cycle block
as the number of threads to be cut for every inch of axis motion.
Axis Parameter
Number
All [401]
Range
Selection Result
(a) Inch / Rev
(b) Num of Threads / Inch
Notes
This is a global parameter; the value set here applies to all axes
and processes.
37.7
Threading E Word Definition