3.5.8
Motor synchronization for measuring range extension
Based on the technical and geometrical properties of the LMS4000, objects up to 1 m
in height can be measured continuously on a width of approx. 2.6 m. At a height of up
to 2 m, a continuous width of approx. 1.4 m is achievable.
To increase the width of the field for the intended application or to avoid shadowing
effects caused by geometrical properties, multiple LMS4000 sensors can be assem‐
bled side by side to extend the measuring range. To avoid mutual optical interference of
adjacent sensors (beam dazzle or reflection), the motors can be synchronized.
Figure 11: Mounting 2 LMS4000 LiDAR sensors side by side (example)
If you are using motor synchronization, please note:
•
The slave devices do not send feedback to the master. The
Sync
LED on the mas‐
ter lights up as soon as the sync signal is sent. The
Sync
LED on the slave starts
flashing as soon as a sync signal is received and lights up permanently once the
motors have been synchronized.
•
If devices are mounted exactly in parallel (angle of rotation = 0°), the default set‐
ting for the phase at the slave can usually be left unchanged at 0°.
•
For devices that are mounted at a specific angle of rotation in relation to each
other, direct dazzle can be virtually excluded through motor synchronization.
Reflection can occur at certain angles depending on the distance between devices
and the measuring distance to the object. Although these effects can be reduced
by adjusting the phase, if the objects being scanned are of different heights they
cannot be ruled out completely.
•
The maximum phase angle is 80°; this is approximately equivalent to the angle at
which the laser exits the device. Inside the device, the covered angle is 120°.
•
There is no fixed upper limit on the number of devices that can be synchronized
via the master signal. However, the total length of the transmission cables must
not exceed 20 m.
Setting up motor synchronization:
1.
Connect the motor-sync I/Os and the sensors to be synchronized using shielded
cables.
2.
Viewed from the front, define the device located furthest to the left as the
master
(set the corresponding parameter value in the
Interfaces
view in the SOPAS ET soft‐
ware).
PRODUCT DESCRIPTION
3
8023198//2018-06-18 | SICK
O P E R A T I N G I N S T R U C T I O N S | LMS4000
23
Subject to change without notice
