Siemens SINUMERIK 840D sl Function Manual page 1316

V1: Feedrates
17.2 Path feedrate F
For more information on the spindle-speed limitations, see function description S1: "Spindles",
Section: "Spindle monitoring (Page 1283)".
Note
The speed limits changed with G25/G26/LIMS in the part program are taken into the setting
data and therefore remain saved after the end of program.
However, if the speed limits changed with G25/G26/LIMS are no longer to apply after the end
of program, the following definitions must be inserted in the GUD block of the machine
manufacturer:
REDEF $SA_SPIND_MIN_VELO_G25 PRLOC
REDEF $SA_SPIND_MAX_VELO_G26 PRLOC
REDEF $SA_SPIND_MAX_VELO_LIMS PRLOC
Master spindle changeover with G96, G961
If the master spindle is switched over when G96, G961 are active, the speed of the former
master spindle is retained. This corresponds to a transition from G96 to G97. The master
spindle newly defined with SETMS executes the "Constant cutting rate" function generated in
this way.
Alarms
Constant cutting rate G96, G961, G962
● If no F value is programmed, alarm 10860 "No feedrate programmed" is output. The alarm
is not generated with G0 blocks.
● Alarm 14800 "Programmed path velocity smaller than or equal to zero" is output while
programming a negative path velocity.
● If, with an active G96, G961 or G962, no transverse axis is defined in the machine data:
MD20100 $MC_DIAMETER_AX_DEF (geometry axis with transverse axis function),
alarm 10870 "No transverse axis defined" is output.
● If a negative maximum spindle speed is programmed with the LIMS program command
when G96, G961 are active, alarm 14820 "Negative maximum spindle speed programmed
for G96, G961" is output.
● If no constant cutting rate is programmed when G96, G961 is selected for the first time,
alarm 10900 "No S value programmed for constant cutting rate" is output.
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Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions