Baumer USB3 Vision, User Manual

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Timers 9.6.7
Timers were introduced for advanced control of internal camera signals.
For example, using a timer allows you to control the flash signal in such a way that the
illumination does not start synchronized to the sensor exposure but rather a predefined
interval earlier.
On Baumer VLU cameras, the timer configuration includes four components:
Exposure
Timer
t
exposure
t
triggerdelay
Trigger
t
TimerDuration
t
TimerDelay
Component Description
TimerTriggerSource This feature provides a source selection for each timer.
TimerTriggerActiva-
tion
This feature selects the part of the trigger signal (edges or
states) that activates the timer.
TimerDelay This feature represents the interval between the incoming trig-
ger signal and the start of the timer.
TimerDuration This feature is used to adjust the activation time of the timer.
Flash Delay 9.6.7.1
As previously stated, the timer feature can be used to start the connected illumination
earlier than the sensor exposure.
This implies a timer configuration as follows:
The flash output must be wired to the selected internal timer signal. ▪
The trigger source and trigger activation for the timer need to be the same as for the ▪
sensor exposure.
The TimerDelay feature (t ▪
TimerDelay
) needs to be set to a lower value than the trigger
delay (t
triggerdelay
).
The duration (t ▪
TimerDuration
) of the timer signal should last until the exposure of the sensor
is completed. This can be realized using the following formula:
t
TimerDuration
= (t
triggerdelay
– t
TimerDelay
) + t
exposure
9.6.8 Frame counter
The frame counter is part of the Baumer Image Info Header and is supplied with every im-
age, if chunk mode is activated. It is generated by hardware and can be used to verify that
each of the camera's images is transmitted to the PC and received in the right order.
◄ Figure 35
Poss ble timer con-
figuration on a Baumer
VLU.