Rockwell Automation 8520-ARM2 9/Series CNC AMP Reference Manual Documentation Set - Manual (Page 578)

Cylindrical/Virtual C Parameters
Chapter 30
30-14
For orientation dependent applications it is recommended that a spindle
homing operation be performed prior to entering the virtual C mode.
One method of performing a spindle home operation is to use spindle
orient (M19). Spindle homing is performed automatically when the
control enters spindle orient mode. This method requires that the part
program, PAL program or operator execute a spindle orient (M19S0)
immediately prior to entering virtual C mode.
Instead, this parameter can be used to force a spindle home operation each
time virtual C mode is entered. By setting this parameter to “YES,” the
control will automatically perform a spindle home operation and locate the
spindle to zero. This homing operation will occur immediately before the
first move is performed in virtual C mode.
Parameter Parameter Number
Single Process Process 1 Process 2
Automatic Home on Virtual C Entry [243] [20243] [21243]
Range
Selection Result
(a) Yes
(b) No
Notes
This parameter is used for lathe controls only.
In the dual--processing lathe, this is a per process parameter. The value set
in the parameters applies to all of the axes assigned to that process.
This feature is not available on the 9/230 control.
END OF CHAPTER