Siemens SINUMERIK 840D sl Programming Manual page 100

Fundamentals
2.6 Spindle motion
Examples
Example 1: Activating the constant cutting speed with speed limitation
Program code
N10 SETMS (3)
N20 G96 S100 LIMS=2500
...
N60 G96 G90 X0 Z10 F8 S100 LIMS=444
Example 2: Defining speed limitation for four spindles
Speed limitations are defined for spindle 1 (master spindle) and spindles 2, 3, and 4:
Program code
N10 LIMS=300 LIMS[2]=450 LIMS[3]=800
LIMS[4]=1500
...
Example 3: Y-axis assignment for face cutting with X axis
Program code
N10 G18 LIMS=3000 T1 D1
N20 G0 X100 Z200
N30 Z100
N40 G96 S20 M3
N50 G0 X80
N60 G1 F1.2 X34
N70 G0 G94 X100
N80 Z80
N100 T2 D1
N110 G96 S40 SCC[Y]
...
N140 Y30
N150 G01 F1.2 Y=27
N160 G97
N170 G0 Y100
Further information
Calculation of the spindle speed
100
Comment
; Constant cutting speed = 100 m/min,
max. speed = 2500 rpm
; Max. speed = 444 rpm
Comment
; Speed limitation at 3000 rpm
; Constant cutting speed = 20 m/min, is dependent
upon X axis.
; Face cutting in X at 1.2 mm/revolution.
; Y axis is assigned to G96 and G96 is activated (can
be achieved in a single block). Constant cutting
speed = 40 m/min, is dependent upon X axis.
; Plunge-cutting in Y, feedrate F = 1.2 mm/revolution.
; Constant cutting speed off.
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
NC programming