Spindle Function (S Function); Spindle Command (S5-Digit Command) - Siemens Sinumerik 802D sl Programming Manual

Movement Control Commands

3.5 Spindle function (S function)

3.5 Spindle function (S function)
3.5.1

Spindle command (S5-digit command)

A spindle speed can be directly specified by entering a 5-digit number following
address S. The unit of spindle speed is "r/min". If an S command is specified with
M03 (spindle forward rotation) or M04 (spindle reverse rotation), the program
usually advances to the next block only after the spindle has reached the speed
specified by the S command. For details, refer to the instruction manuals published
by the machine tool builder.
Example of programming
S1000 M03;
Fig. 3-18
S For the output of S5-digit commands, it is possible to add the control function
implemented by the PLC can be added by the NC. In this case, it is possible to
set the spindle speed in manual operation to the speed that corresponds to the
specified S command by using the rotary switch on the machine operation
panel. For details, refer to the manuals published by the machine tool builder.
S An S command is modal and, once specified, it remains valid until another
S command is given next. If the spindle is stopped by the execution of M05, the
S command value is retained. Therefore, if M03 or M04 is specified without an
S command in the same block, the spindle can start by using the S command
value specified before.
S The lower limit of an S command (S0 or an S command close to S0) is determi-
ned by the spindle drive motor and spindle drive system, and it varies with each
machine. Do not use a negative value for an S command. For details, refer to
the instruction manuals published by the machine tool builder.
3-80
S
1000 r/min
Start of the block indicated above
Spindle speed command
SINUMERIK 802D sl/840D sl840D/840Di sl/840Di/810D ISO Turning - - 04.07 Edition
Spindle speed agreed
Actual spindle speed
Start of spindle
rotation
Completion of M
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04.07
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