Siemens SINUMERIK 840Di sl Programming Manual page 303

Programming
M3 or M1=3
or
M4 or M1=4
or
M5 or M1=5
S...
Or
Sn=...
Or
SETMS(n) or SETMS
Parameters
M1=3 M1=4 M1=5
M3
M4
M5
S...
Sn...=
SETMS(n)
SETMS
Spindle speed S
The speed specified with S... or S0=... applies to the master spindle. You specify the
corresponding number for additional spindles: =..., S2=...
Note
Three S values can be programmed per NC block.
Example of master spindle with work spindle
S1 is the master spindle, S2 is the second spindle. The part is to be machined from two
sides. To do this, it is necessary to divide the operations into steps. After the cut-off point,
the synchronizing device (S2) takes over machining of the workpiece after the cut off. To do
this, this spindle S2 is defined as the master spindle to which G95 then applies.
Fundamentals
Programming Manual, 11/2006, 6FC5398-1BP10-2BA0
7.10 Spindle speed (S), direction of spindle rotation (M3, M4, M5)
Spindle rotation clockwise/counterclockwise, spindle stop for spindle
1. Other spindles are defined according to M2=... M3=...
Direction of spindle rotation clockwise for master spindle
Direction of spindle rotation counterclockwise for master spindle
Spindle stop for master spindle
Spindle speed in rpm for the master spindle
Spindle speed in rpm for spindle n
Set spindle specified in n as master spindle
Reset to the master spindle defined in machine data
Feedrate Control and Spindle Motion
303