Operating Instructions
Chapter
11
CLV65x Bar Code Scanner
Appendix
8011980/0000/2009-04-21
©
SICK AG · Division Auto Ident · Germany · All rights reserved
119
Reading pulse
Triggering of the internal reading gate via a bar code scanner-external pulse is carried out
by means of an external trigger source such as a photoelectric reflex switch or a command
string via the data interface. With internal trigger source "automatic tick", the bar code scan-
ner creates the reading pulse itself.
Reading gate, reading interval
Time window in which the bar code scanner switches on the scanning line and attempts to
recognise valid bar codes from the read information. The reading gate can be shorter than
the external reading pulse, depending on the output mode of the selected reading result.
Reading angle (RA value)
The reading angle from the reading window to the red scanning line of the scanning beam
under which the middle of a bar code is detected. Recorded by the bar code scanner for
each scan and used, e. g., for the separation of bar codes with identical data contents. For
the decoding process, the active analysis area along the scanning line can be restricted ap-
plication- specifically by presetting the minimum and maximum RA values.
Line scanner
Scanner that uses a polygon mirror wheel with paraxial mirrors to deflect a focused laser
beam extremely fast. As a result, it creates a light spot in the reading plane that moves along
a straight line, which appears to the naked eye as a stationary scan line.
Line scanner with oscillating mirror
Line scanner that also deflects the laser beam about a central position, on both sides and
perpendicular to the san direction using an oscillating mirror. By doing so, the bar code
scanner can search for bar codes in larger areas. In addition to basic deflection to the ma-
ximum oscillation amplitude, optimum oscillating mirror functions are also possible.
Master/Slave configuration
Special arrangement and technical circuit connection of several bar code scanners to one
reading station (e.g. multi-side reading) using the CAN interface. Via the master the combi-
nation acts on the host as just one device.
Multi-reading
Selectable number of readings which must each deliver internal results from one and the
same bar code before the bar code scanner generates the reading result.
Aperture angle
α
Aperture within the boundaries of which the bar code scanner is able to detect codes
(through the lenses). A V-shaped area appears radially in front of the reading window, at
right angles to the conveyor system (reading from above), in which the codes to be read
must be positioned.
