Rockwell Automation 8520 9/Series CNC Lathe - Manual (Page 423)

Spindles
Chapter 17
17-25
The following example assumes that the controlling and follower spindles
were defined as spindle 2 and spindle 1, respectively, by your system
installer.
Example 17.4
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)
Example 17.5 shows two spindles attempting synchronization to
transferring a part. The following steps describe the synchronization
process in this example.
1. The follower spindle, B, attempts to match its velocity with the
controlling spindle (A).
2. Once velocities are matched, spindle B reaches its relative position,
which is offset from the position of spindle A.
3. When synchronization is achieved, the spindle axis advances to
engage the part.
4. Spindle B clamps the part held by spindle A.
5. Spindle A unclamps, transferring the part to spindle B.
6. The spindles move apart and synchronization is disabled (G45).
Example 17.5
A
B
Spindle B moves into spindle A.