Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set - Manual (Page 444)

Spindles
Chapter 17
17-8
The following example assumes that the controlling and follower spindles
were defined as spindle 2 and spindle 1, respectively, by your system
installer.
Example 17.2
Spindle Synchronization
M03 S200; Spindle 1 clockwise 200 rpm
M04.2 S400; Spindle 2 counterclockwise at 400 rpm
G12.2; Spindle 2 as controlling spindle
G46 S90; Spindle 1 changes direction and accelerates to spindle 2’s
speed; spindle 1 synchronizes angular position with spindle
2 (offset 90 degrees)
Activate Spindle Speed Synchronization (G46.1)
Use the “Activate Spindle Speed Synchronization” to synchronize speed
and direction only. Using G46.1 does not guarantee a consistent positional
offset between the two spindles. During a G46.1, the follower spindle
attempts to synchronize speeds with the controlling spindle. Once
synchronization is achieved, the current spindle speed and mode (M03,
M04, M05, or M19) programmed for the follower spindle is replaced by
the current controlling spindle speed and mode programmed. The original
follower spindle speed and direction is not retained.
Important: Changes that occur as a result of CSS or other programmed
changes to spindle speeds, directions, and spindle speed override will not
occur until synchronization is achieved.
The format for the G46.1 cycle is as follows:
G46.1;
Important: No other program letters are allowed in the G46.1 block
except auxiliary letters and system installer M--codes.