Siemens SINUMERIK 840Di sl Programming Manual page 307

Programming
Activate
G96 or G96 S...
Deactivate
G97
or
G973 without activating spindle speed limiting
Activate/deactivate
G961 or G971 with feed type as for G94
or
G962 or G972 with feed type, either as for G94 or as for G95
Speed limitation of the master spindle in a block
LIMS=value or LIMS[1]=value up to LIMS[4]=value in one block
LIMS can be expanded for machines with selectable master spindles by adding four
limitations in the parts program for each of these master spindles. The speed limitation
programmed with G26 or specified via setting data cannot be exceeded with LIMS and
activates an alarm if not observed.
Assignment of the specified axis as a reference axis
SCC[AX] can be programmed together with G96/G961/G962 or in isolation.
Note
The reference axis for G96/G961/G962 must be a geometry axis assigned to the channel at
the time when SCC[AX] is programmed. SCC[AX] can also be programmed when any of the
G96/G961/G962 functions are active.
Parameters
G96
G961=
G962=
S...
Range of values
G97
Fundamentals
Programming Manual, 11/2006, 6FC5398-1BP10-2BA0
7.11 Constant cutting rate (G96/G961/G962, G97/G971/G972, G973, LIMS, SCC[AX])
Activate constant cutting rate with feedrate type as with G95
(revolutional feedrate in relation to a master spindle).
Activate constant cutting rate with feedrate type as with G94 (linear
feedrate in relation to a linear/rotary axis).
Activate constant cutting rate with feedrate type as with G94 or G95.
Cutting rate in m/min, always applies to master spindle Range of
values.
The range of values for the cutting rate S can be between 0.1 m/min
... 9999 9999.9 m/min. The precision can be set in the machine data.
Note:At G70/G700: cutting rate is in feet/min.
Deactivate constant cutting rate with feedrate type as with G95
(revolutional feedrate in relation to a master spindle).
Feedrate Control and Spindle Motion
307