Siemens Sinumerik 840D sl Programming Manual page 70

Motion commands
3.6 Controlling the feedrate
Configuration
The override value is set over the following setting data:
42520: $SC_CORNER_SLOWDOWN_START
42522: $SC_CORNER_SLOWDOWN_END
42524: $SC_CORNER_SLOWDOWN_OVR
42526: $SC_CORNER_SLOWDOWN_CRIT
The setting data is preassigned with the value 0.
● If $SC_CORNER_SLOWDOWN_CRIT = 0, the corner deceleration is effective only at
● If $SC_CORNER_SLOWDOWN_START and $SC_CORNER_SLOWDOWN_END are
● If $SC_CORNER_SLOWDOWN_OVR = 0, then a transient stop is inserted.
● $SC_CORNER_SLOWDOWN_CRIT is related to the geometry axes in G62. It defines the
Activating
The function is activated via G62. The G code is active either via the corresponding part
program command or as default through MD20150 $MC_GCODE_RESET_VALUES[56].
Example
Tool data in the Siemens mode
$TC_DP1[1,1]=120
$TC_DP3[1,1]=0 ; length compensation vector
$TC_DP4[1,1]=0.
$TC_DP5[1,1]=0.
Setting the setting data in the Siemens mode
N1000 G0 X0 Y0 Z0 F5000 G64 SOFT
N1010 STOPRE
N1020 $SC_CORNER_SLOWDOWN_START = 5.
N1030 $SC_CORNER_SLOWDOWN_END = 8.
N1040 $SC_CORNER_SLOWDOWN_OVR = 20.
N1050 $SC_CORNER_SLOWDOWN_CRIT = 100.
Program in the ISO mode
N2010 X00 Y30 G90 T1 D1 G64
N2020 X40 Y0 G62 G41
N2030 X80 Y30
N2040 Y70
N2050 X40 Y40
N2060 X20 Y70
70
reversal points.
equal to 0, then the feedrate reduction is approached with the permissible dynamic
response.
maximum internal angle in the current machining plane up to which the corner
deceleration is used. G62 is not effective in rapid traverse.
; Inner corner of N2030,
; but WRK still selected
; Inner corner of N2040 127 degree
; Inner corner of N2050 53 degree
; Outer corner of N2060
; Inner corner of N2070 97 degree
Programming Manual, 06/09, 6FC5398-7BP10-1BA0
ISO Milling