Constant Cutting Rate (G96/G961/G962, G97/G971/G972, G973, Lims, Scc) - Siemens SINUMERIK 840D sl Programming Manual

Fundamentals
2.6 Spindle motion
2.6.3

Constant cutting rate (G96/G961/G962, G97/G971/G972, G973, LIMS, SCC)

If the "Constant cutting speed" function is active, the spindle speed is modified as a function of
the respective workpiece diameter so that the cutting speed S in m/min or ft/min remains
constant at the tool edge.
①
②
③
This results in the following advantages:
● Uniformity and consequently improved surface quality of turned parts
● Machining with less wear on tools
Syntax
Activating/deactivating constant cutting speed for the master spindle:
G96/G961/G962 S...
...
G97/G971/G972/G973
Speed limitation for the master spindle:
LIMS=<value>
LIMS[<spindle>]=<value>
Other reference axis for G96/G961/G962:
SCC[<axis>]
Note
SCC[<Axis>] can be programmed together with G96/G961/G962 or separately.
98
Constant cutting rate
Increased spindle speed
Reduced spindle speed
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
NC programming