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Movement Control Commands

3.6 S, T, M, and B functions

04.07

3-86

SINUMERIK 802D sl/840D/840D sl/840Di/840Di sl/810D ISO Milling (PGM) -- 04.07 Edition

3.6 S, T, M, and B functions

3.6.1 Spindle function (S function)

A spindle speed can be directly specified by entering a 5-digit number following

address S (Sjjjjj). 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;

1000 r/min Spindle speed agreed

Actual spindle speed

Start of spindle

rotation

Completion of M

Start of the block indicated above

Fig. 3-27 Spindle speed command

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 va-

lue specified before.

S If a spindle speed is changed while the spindle is rotating by the execution of

M03 or M04, pay attention to the selected spindle speed gear range. For de-

tails, refer to the instruction manuals published by the machine tool builder.

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.

Siemens SINUMERIK 802D sl Programming Manual

Other manuals for Siemens SINUMERIK 802D sl