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6
Mounting
The bar code readers can be mounted in different ways:
• Using two M4x6 screws on the rear of the device or using four M4x6 screws on the bottom of the
device (see figure 3.2).
• Using a BT 56 mounting device on the two fastening grooves (see figure 15.3).
• Using a BT 59 mounting device on the two fastening grooves (see figure 15.4).
6.1
Device arrangement
6.1.1
Selecting a mounting location
In order to select the right mounting location, several factors must be considered:
• Size, orientation, and position tolerance of the bar codes on the objects to be scanned.
• The reading field of the device in relation to the bar code module width.
• The resulting minimum and maximum reading distance from the respective reading field (see
chapter 15.4 "Reading field curves / optical data").
• The permissible cable lengths between the device and the host system depending on which interface
is used.
• The correct time for data output. The device should be positioned in such a way that, taking into con-
sideration the time required for data processing and the conveyor belt speed, there is sufficient time
to e.g. initiate sorting operations on the basis of the read data.
• The display and control panel should be very visible and accessible.
• For configuring and commissioning with the webConfig tool, the USB interface should be easily
accessible.
• Maintaining the required environmental conditions (temperature, humidity).
• Possible soiling of the reading window due to liquids, abrasion by boxes, or packaging material resi-
dues.
• Lowest possible chance of damage to the device by mechanical collision or jammed parts.
• Possible extraneous light (no direct sunlight or sunlight reflected by the bar code).
With the line scanner, the beam exits the device parallel to the housing base; with the oscillating
mirror, the beam exits perpendicular to the housing base. The housing base is the black surface.
The best read results are obtained when:
• The device is mounted in such a way that the scanning beam is incident on the bar code at an angle
of inclination greater than ±10° ... 15° to vertical.
• The reading distance lies in the middle area of the reading field.
• The bar code labels are of good print quality and have good contrast ratios.
• You do not use high-gloss labels.
• There is no direct sunlight.
6.1.2
Avoiding total reflection – Line scanner
The bar code label must be positioned at an angle of inclination greater than ±10° ... 15° from vertical in
order to avoid total reflection of the laser beam (see figure 6.1)!
Total reflection occurs whenever the laser light of the bar code reader is directly incident on the surface of
the bar code at an angle of 90°. The light directly reflected by the bar code may overload the bar code
reader and thereby cause non-readings!
Leuze electronic
BCL 608i
Mounting
23
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