Siemens SINUMERIK 840D sl Function Manual page 712

Punching and Nibbling (N4)
10.2 Stroke control
Programming
G603
G602
G601
Note
The initial setting of the G group with G601, G602 and G603 (G group 12) is defined via
machine data:
MD20150 $MC_GCODE_RESET_VALUES[11]
The default setting is G601.
G603
Depending on velocity and machine dynamics, approximately 3 - 5 interpolation cycles are
processed at the end of interpolation before the axes reach zero speed.
MD26018 $MC_NIBBLE_PRE_START_TIME
In conjunction with the above machine data, it is possible to delay, and therefore optimize,
the instant between reaching the end of interpolation and setting the high-speed output for
"Stroke ON".
The following setting data is available in addition to MD26018:
SD42402 $SC_NIBPUNCH_PRE_START_TIME
SD42402 can be changed from the part program and therefore adapted to the punching
process depending on the progress of the part program run.
The following applies to the delay time:
MD26018 = 0
MD26018 ≠ 0
If the "Punching with dwell time, PDELAYON" is active, then the dwell time programmed in
connection with this function is active. Neither MD26018 nor SD42402 is operative in this
case.
712
Activation
Stop interpolation
Reach the coarse in-
position window
Reach the fine in-
position window
→ SD42402 is operative
→ MD26018 is operative
Description
The interpolation reaches the block end. In this case,
the axes continue to move until the overtravel has
been traversed, i.e. the signal is output at an
appreciable interval before the axes have reached
zero speed (see t" ).
1
The signal is output once the axes have reached the
coarse in-position window. If this criterion is selected
for stroke initiation output, then the instant of stroke
initiation can be varied through the size of interpolation
window (see t' ).
1
In this case, it can always be ensured that the machine
will have reached a standstill at the instant of punching
provided that the axis data are set appropriately.
However, this variant also results in a maximum dead
time (see t ).
1
Function Manual, 01/2008, 6FC5397-1BP10-3BA0
Extended Functions