53
9.6.2 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 predened time intervals.
Trigger (valid)
Exposure
Readout
Time
A
B
C
Different trigger sources can be used here.
9.6.3 Trigger Source
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VCXU
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Each trigger source has to be activated separately. When the trigger mode is activated,
the hardware trigger is activated by default.
▲Figure40
Trigger signal, valid for
Baumer cameras.
high
low
U
11V
30V
◄Figure41
Camera in trigger
mode:
A - Trigger delay
B - Exposure time
C - Readout time
Trigger Delay:
The trigger delay is a
exible user-dened 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 with a stepsize
of 1 μsec. In the case of
multiple triggers during the
delay the triggers will be
stored and delayed, too.
The buffer is able to store
up to 512 trigger
signals during the delay.
Your benets:
▪ No need for a perfect
alignment of an external
trigger sensor
▪ Different objects can be
captured without hardware
changes
◄Figure42
Examples of possible
trigger sources.