SICK Ranger3

•
Dual-channel encoder, forward direction: The trigger point occurs when channel B
goes from 1 to 0. See figure A.
•
Dual-channel encoder, backward direction: The trigger point occurs when channel
A goes from 1 to 0. See figure B.
•
Single-channel encoder: The trigger point occurs when channel A goes from 0 to 1.
See figure C.
•
High-resolution encoder: The trigger point occurs for every single rising or falling
edge on any channel.
0 0
A B
1 0
A B
1 1
A B
0 1
A B
0 0
A B
1 0
A B
1 1
A B
0 1
A B
A 0
A 1
A
B
C
1
1
1
Figure 35: Encoder states and possible transitions
1
Trigger point
8.10.4 Frame triggering
The Frame trigger input is used to trigger the camera to start to acquire profiles when
the object passes a photoelectric sensor. If the same photoelectric sensor is connected
to several cameras then synchronization at the microsecond level can be achieved.
When using the Frame trigger input, the Height[Scan3dExtraction1] parameter specifies
the number of profiles that the camera acquires after the Frame trigger signal goes
high. After the specified number of profiles, the camera will either idle or continue to
acquire another series of profiles, depending on the state of the Frame trigger signal
and the settings of the acquisition control parameters. See the table and the figure
below.
Parameter settings
TriggerSelector = FrameStart
TriggerMode[TriggerSelector] = Off
•
The camera acquires profiles continuously.
TriggerSelector = FrameStart
TriggerMode[TriggerSelector] = On
•
The acquisition of a new series of profiles (that is, captur‐
ing of a new frame) starts each time the Frame trigger
input has a high level as input.
•
Multiple Frame trigger signals are ignored until all pro‐
files (as specified by Height[Scan3dExtraction1]) have been
acquired.
•
Note that for the very first profile the camera requires not
only a high level but also a rising edge.
The system adapts the buffer height for the frame grabber and the camera to the
Height[Scan3dExtraction1] parameter to keep the image synchronized and receive a full
image after the image capture is completed. To avoid unnecessary CPU load, set the
Height[Scan3dExtraction1] parameter to no less than 100 pixels.
8
CONFIGURATION
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O P E R A T I N G I N S T R U C T I O N S | Ranger3 8020774/1D7Q/2022-03 | SICK
Subject to change without notice