Siemens sinumerik 840D sl Function Manual page 423

Detailed description
2.1 Function
The "setpoint exchange" function is required in applications in which a single motor needs to
drive a number of axes/spindles such as, for example, on milling machines with special
millheads. The spindle motor is operated as both a tool drive and a millhead orienting
mechanism.
Figure 2-1
Figure 2-2
Special functions: Setpoint Exchange (S9)
Function Manual, 11/2006, 6FC5397-2BP10-2BA0
Example 1: 1 motor encoder, extra encoder for millhead
Example 2: 1 motor encoder, separate millhead encoder and spindle encoder
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