Siemens SINUMERIK 840D sl Function Manual page 743

10.2.3 Criteria for stroke initiation
Initiate a stroke
The stroke initiation must be set, at the earliest, for the point in time at which it can be
guaranteed that the axes have reached a standstill. This ensures that at the instant of
punching, there is absolutely no relative movement between the punch and the metal sheet
in the machining plane.
The following diagram shows the various criteria that can be applied to stroke initiation.
Figure 10-2 Signal chart: Criteria for stroke initiation
The time interval between t
setting of output A
dead times.
The diagram above shows the default setting with which the output is set when the "Exact
stop fine window" is reached (G601; default setting of G group 12). The punch initiation times
t'' and t'
1
Extended Functions
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
and t
1
. This cannot be altered, but can be utilized as a lead time for minimizing
0
are programmed by means of G602 and G603 (see table below).
1
is determined by the reaction of the punching unit to
2
Punching and Nibbling (N4)
Stroke control
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