Feedrate Control and Spindle Motion
7.11 Constant cutting rate (G96/G961/G962, G97/G971/G972, G973, LIMS, SCC[AX])
Fundamentals
308 Programming Manual, 11/2006, 6FC5398-1BP10-2BA0
G971=
Deactivate constant cutting rate with feedrate type as with G94 (linear
feedrate in relation to a linear/rotary axis).
G972=
Deactivate constant cutting rate with feedrate type as with G94 or
G95.
G973=
Deactivate constant cutting rate without activating speed limiting.
LIMS=
The speed limitation is active if G96, G961 and G97 are active for the
master spindle (LIMS does not work with G971). LIMS applies to the
master spindle.
LIMS[1 to 4]=value
Limitations of differing values can be programmed for up to four
spindles within one block. Unless expansion is specified, LIMS will
only remain effective for one master spindle.
SCC[axis]
Selective assignment of specified axis to G96/G961/G962
Value
Spindle speed limitation in RPM
Axis
A reference axis is permitted to take the form of a geometry, channel
or machine axis, otherwise alarm 14850 will be signaled.
Example of speed limitation for the master spindle
N10 SETMS (3)
N20 G96 S100 LIMS=2500
;Speed limitation at 2500 rpm
or
N60 G96 G90 X0 Z10 F8 S100
LIMS=444
;Max. speed of the master spindle is 444 rpm
Example of speed limitation for up to four spindles
Speed limitations are defined for spindle 1 (supposed master spindle) and spindles 2, 3 and
4:
N10 LIMS=300 LIMS[2]=450 LIMS[3]=800 LIMS[4]=1500
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