Chapter
8
Operating Instructions
CLV640 Bar Code Scanner
76
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SICK AG · Division Auto Ident · Germany · All rights reserved
8011975/0000/2008-04-14
Maintenance
8.3
Cleaning further optical effective surfaces
Depending on the reading system equipment, additional external sensors with optical effec-
tive surfaces can be installed (e.g. photoelectric reflex switch for external reading pulsing).
Soiling of these sensors can cause incorrect switching behaviour.
¾
In order to prevent incorrect switching behaviour, remove soiling from the optical effec-
tive surfaces of the external sensors.
Fig. 8-2:
Cleaning of the external optical sensors (reading pulse generator)
8.4
Checking the incremental encoder
If an optional incremental encoder is used, the position of the friction wheel at the drive sys-
tem should be checked at regular intervals.
¾
Ensure that the incremental encoder has direct and fixed contact with the drive system
and that the friction wheel rotates without slipping.
8.5
Replacing a bar code scanner
Incorrect or damaged bar code scanners have to be removed and replaced with either new
or repaired bar code scanners.
Important
Repairs to the bar code scanner should only be carried out by qualified and authorised
SICK AG service staff.
8.5.1
Removing the bar code scanner
1. Switch the power supply to the bar code scanner off.
2. Disconnect all the connection cables on the bar code scanner.
3. Remove the bar code scanner from the holder. Mark the bar code scanner's situation
and alignment on the holder or environment.
4. If available, remove the Micro SD memory card (optional) with the stored parameter set
from the faulty bar code scanner (see
chapter 4.7.4 Parameter set on the Micro SD
memory card (optional), page 40
). To do this, carefully open the black rubber cover and
slightly press on the memory card in order to unlock it.
5. Insert the memory card accordingly into the empty space of the new, turned-off bar
code scanner the right way round (contacts to the back and top) until it is locked.
6. Close the rubber cover.
