Siemens SINUMERIK 840Di sl Programming Manual page 310

Feedrate Control and Spindle Motion
7.11 Constant cutting rate (G96/G961/G962, G97/G971/G972, G973, LIMS, SCC[AX])
Note
On loading the block into the main run, all programmed values are transferred into the
setting data.
Deactivate constant cutting rate, G97/G971/G973
After G97/G971, the control interprets an S word as a spindle speed in rpm again. If you do
not specify a new spindle speed, the last speed set by G96/G961 is retained.
• The G96/G961 function can also be deactivated with G94 or G95. In this case, the last
programmed speed S is used for further machining operations.
• G97 can be programmed without G96 beforehand. The function then has the same effect
as G95; LIMS can also be programmed.
• With G961 and G971, the constant cutting rate can be activated/deactivated.
• Using G973, the constant cutting rate can be deactivated without activating a spindle
speed limitation.
Note
The transverse axis must be defined in machine data.
310
Programming Manual, 11/2006, 6FC5398-1BP10-2BA0
Fundamentals