Device Arrangement; Selecting A Mounting Location; Determining The Camera Distance - Leuze electronic LSIS 4xxi Series Original Operating Instructions

4.3

Device arrangement

4.3.1

Selecting a mounting location

In order to select the right mounting location, several factors must be considered:
• The camera distance which results from the respective field of view (see figure 4.6 on
page 23 or figure 4.7 on page 24).
• The permissible cable lengths between the LSIS
on which interface is used.
• The display and control panel should be very visible and accessible.
• For configuring and commissioning with the webConfig tool, the service interface
should be easily accessible.
• Mount the LSIS
sunlight or strong ambient light.
 When selecting a mounting location, pay further attention to:
• Maintaining the required environmental conditions (temperature, humidity).
• Possible soiling of the viewing window due to liquids, abrasion by boxes, or
packaging-material residues.
• Lowest possible chance of damage to the LSIS
jammed parts.
4.3.2

Determining the camera distance

In figure 4.6 and figure 4.7, the principle relationship between camera distance and the
resulting image field is represented for the C-mount device models.
In general, the visible image field increases with the camera distance. If a larger image field
is needed, the camera distance must be increased accordingly. This also results in a
decrease in the resolution of the image, however.
The diagram in figure 4.6 shows the relationship between camera distance (= path from the
front edge of the camera to the object) and image field for standard devices with 8mm and
16mm focal length. In figure 4.7, this relationship is represented for the C-mount device
models.
The following applies for devices with integrated illumination:
For camera distances between 50mm and 250mm, particularly homogeneous illumination
of the image field is ensured.
Larger camera distances can be realized than are represented in the respective diagrams.
In this case, the axis of the respective diagram is extrapolated.
Listed on the right side of the diagrams is the pixel size that corresponds to the respective
image field. A segmented object is detected in the image only if at least 16 pixels in size.
The following minimum module or cell sizes apply for code readings:
• Printed, high-contrast codes: 3 pixels
• Directly marked, low-contrast codes: 5 pixels
Leuze electronic
4xxi so that the object being inspected is not exposed to direct
LSIS 4xxi
Installation and mounting
4xxi and the host system depending
4xxi by mechanical collision or
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