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

Spindle motion

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

6.3 Constant cutting rate (G96/G961/G962, G97/G971/G972, G973,
LIMS, SCC)
Function
When the "Constant cutting rate" function is active, the spindle speed is modified as a
function of the respective workpiece diameter so that the cutting rate S in m/min or ft/min
remains constant at the tool edge.
This results in the following advantages:
• Uniformity and consequently improved surface quality of turned parts
• Machining process is kinder to tools
Syntax
Activating/Deactivating constant cutting rate 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 in isolation.
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Programming Manual, 09/2011, 6FC5398-1BP40-2BA0
Fundamentals