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Bar Code Validation System (Model BC-20)
     
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BENEFITS
  • Validates the bar code on each label.
  • Quick to set up and easy to use.
  • No-guessing alignment.
  • Automatic symbology discrimination.
  • Use on new or existing WT-25LCI Series Machines.
 
FEATURES
  • Compares the bar code on each label with the master bar code.
  • Reads bar codes presented in "ladder" or "picket fence" orientations.
  • Keyed access to "learn master" and "reset error" functions for security.
  • Integral scan width "shutters" to quickly and accurately set the scan "window" for various lengths of labels.
  • Reading distance and angle are preset for "no guessing" alignment.
  • Automatic symbology discrimination to learn the "master" bar code.
 

SPECIFICATIONS
   Symbologies  Code 39, Interleaved 2 of 5,
 Codabar, Code 93,  EAN 128,
 EAN (13 & 8 Digit),
 UPC (Versions A & E), Code 128		  
 Light Source  Visible Laser Diode (670 nm), 1 mW Max
 Terminal Interface  RS-232, 2400 Baud
 Bar Code Resolution  0.008" - 0.020" (0.2-0.5 mm)
All Rights Reserved. © 2002-2003 Web Techniques, Inc.
SYSTEM DESCRIPTION
The BC-20 Bar Code Validation System consists of a bar code scanner/decoder, operator interface control, mounting hardware, and associated connecting devices. The scanner is mounted along the web path and scans each label as it passes from the unwind roll to the rewind roll. It was developed as an add-on device for Web Techniques Model WT-25LCI Roll Label Rewind Machines.

The standard scanner/decoder is programmed to read all symbologies commonly used in commerce and industry, and will accept a wide range of bar code print resolutions (bar/space widths).

Through the use of a serial communications terminal, all of the parameters can be altered to optimize performance for a specific application. A keyed switch is provided for situations in which it is desired to have a supervisor or authorized person other than the operator lock in "master" codes or reset the system after an error.
 

SYSTEM OPERATION
To begin, a "master" bar code is placed in front of the scanner and a switch is operated to instruct the scanner to "learn" the "master" bar code. Within a few seconds, production label validation can begin.

As the machine runs, its counting system signals the passing of labels to the bar code validation system. For the machine to keep running, the scanner must find a bar code on each label that matches the "master" bar code. If no matching bar code is found, the machine will stop to allow the bar code in error to be marked or the label removed.

After the system is reset, optionally with a keyed switch, production validation can resume.