Rockwell Automation 8520-ARM2 9/Series CNC AMP Reference Manual Documentation Set - Manual (Page 535)

Fixed Cycles
Chapter 25
25-15
Function
This parameter is for lathe controls that use the multiple pass threading
cycle G-codes:
System G Code
A G76
B G76
C G78
This parameter determines whether the multiple-pass threading cycle is
going to make a finishing pass and, if so, determines the depth of cut for
this finishing pass.
If a value other than zero is entered for this parameter, the control will
make a finishing pass when executing a multiple-pass threading cycle. The
amount of material removed by this finishing pass is equal to the value set
with this parameter. This is done by forcing the next-to-the-last pass in the
cycle to leave an amount of material, equal to this parameter, above the
actual programmed thread depth. The finish pass is then made cutting at
the actual programmed thread depth. This parameter is always an unsigned
radius value.
Axis Parameter
Number
All [112]
Range
0.00000 to 9999.90000 mm
or
0.00000 to 393.69685 inch
Notes
This is a global parameter; the value set here applies to all axes
and processes.
25.9.4
Finish Allow in Mult
Threading