40
8018478/YWL5/2018-06| SICK
O P E R A T I N G I N S T R U C T I O N S | NAV245
Subject to change without notice
3
PRODUCT DESCRIPTION
Important
The beam diameter is always bigger than the measuring point distance. This ensures a
scanning process without interruptions.
Fig. 28: Beam diameter and measuring point distance at 0 to 50 m
3.10.5
Reflectors
The NAV245 is able to detect reflectors and determine their position. To do this, it must
distinguish between the reflectors and other reflective surfaces. The parameters apply for
the 983-10 reflective tape (part no. 5320565), which can be obtained as an accessory
from SICK AG by quoting REF-DG.
Important
Reflective tapes from other brands may not be detected correctly by the NAV245 or the
working area may be restricted.
The reflector marks are designed as cylindrical reflectors. Cylindrical reflector marks can be
detected from any angle.
Reflector height
The height and vertical position of the reflectors is to be selected such that the measuring
beam hits the reflectors even if the floor is uneven. The maximum sensing range of the
NAV245 is 30 m on reflectors. Depending on the ground conditions and the resulting
measurement distance, the minimum height of the reflectors can be derived from this.
The measuring beam of the NAV245 expands by around 15 mm per meter of measuring
distance (see “Distance between the NAV245 and the object/surface to be measured” on
page 38). Any tilting of the automated guided vehicle caused by uneven ground must be
addressed accordingly (incl. safety supplement). The recommended reflector heights are
500 mm for a measuring distance of up to 30 m and 750 mm for a measuring distance up
to 46 m.
0
Distance [m]
Size [mm]
30
50
0
200
400
Measuring point distance
20
10
600
800
40
Beam diameter
0.25° angular
resolution
Beam diameter
