43
9.6.3 Trigger
Trigger signals are used to synchronize the camera exposure and a machine cycle or, in
case of a software
trigger, to take images at predefined time intervals
.
Trigger (valid)
Exposure
Readout
Time
A
B
C
Different trigger sources can be used here.
9.6.4 Trigger Source
ph
oto
electric sens
or
trigge
r signal
pr
og
ra
mm
able logic co
ntr
ol
er
others
so
ftwa
re trigge
r
Har
dware
trigger
Each trigger source must be activated separately. When the trigger mode is activated, the
hardware trigger is activated by default.
▲ Figure 32
Trigger signal, valid for
Baumer cameras.
high
low
U
t
0
4.5V
11V
30V
t
delay trigger
start active
trigger
◄ Figure 33
Camera in trigger
mode:
A - Trigger delay
B - Exposure time
C - Readout time
Trigger Delay:
The trigger delay is a
flexible user-defined delay
between the given trigger
impulse and the image cap-
ture. The delay time can
be set between 0.0 μsec
and 2.0 sec in increments
of 1 μsec. Where there are
multiple triggers during the
delay, the triggers will also
be stored and delayed. The
buffer is able to store up to
512 trigger
signals during the delay.
Your benefits:
No need for an external
▪
trigger sensor to be perfect-
ly aligned
Different objects can be
▪
captured without hardware
changes
◄ Figure 34
Examples of possible
trigger sources.
Summary of Contents for USB3 Vision
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