Siemens SINUMERIK 840D sl Programming Manual page 90

Spindle motion
6.1 Spindle speed (S), direction of spindle rotation (M3, M4, M5)
Significance
S... :
S<n>=... :
M3:
M<n>=3:
M4:
M<n>=4:
M5:
M<n>=5:
SETMS(<n>):
SETMS:
Note
Up to three S-values can be programmed per NC block, e.g.:
S... S2=... S3=...
Note
SETMS must be in a separate block.
Example
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.
90
Spindle speed in rpm for the master spindle
Spindle speed in rpm for spindle <n>
Note:
The speed specified with S0=... applies to the master spindle.
Direction of spindle rotation clockwise for master spindle
Spindle direction of rotation CW for spindle <n>
Direction of spindle rotation counterclockwise for master spindle
Spindle direction of rotation CCW for spindle <n>
Spindle stop for master spindle
Spindle stop for spindle <n>
Set spindle <n> as master spindle
If SETMS is programmed without a spindle name, the configured master
spindle is used instead.
Programming Manual, 09/2011, 6FC5398-1BP40-2BA0
Fundamentals