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Repeat Length Measurement System for
Post-Printing Inspection and Reporting
Operating Console/Software
Two line display, presents measurement status (in or
out of tolerance), sequence number and
measurement result
Red and Green indicator lights indicate inspection
error or in-tolerance measurements
16 digit keypad makes for fast system set-up
RS232 interface transfers inspection parameters and
results between PC and System Controller
Scanning Devices software is easy to use and captures
process data that can be displayed and analyzed in
Microsoft Excel

Overview
Our Repeat Length Measurement system is ideal for inspecting,
monitoring and reporting in post-printing applications. The system
is effective in monitoring materials that are susceptible to
stretching or web slippage. It is easy to install and can be moved
from press to press to support changing production schedules and
material changes.
The concept of the system is simple. Define the min/max repeat
length that is considered “in-tolerance” for the job being inspected.
Use a scanner to detect the registration mark on the material and
make relative comparisons to the rotation of the press using an
encoder. The Scanning Devices System Console compares the two
measures, computes a ratio and alerts the press operator if the
length between registration marks is out of specification. The
system uses scanner and encoder data to calculate the actual length
of the Repeat and accepts any unit of measure.
The system sends captured data to a computer using Scanning
Devices software which can be exported to Excel for analysis and
quality control reporting.

System Features/Capabilities
System includes, Electronic Console, Registration Scanner,
Encoder, and Scanning Devices Software
Measures variances in milliseconds for precision tolerance
reporting
Operator warning/indicator lights on Electronic Console
illuminate green when material is in spec., red when preestablished min/max tolerances are exceeded
Dimensionless system reports proportional variances without
the need to convert to metric or imperial measures
110 volt system with 3 prong line cord allows the electronic
consol to be easily moved from one press to another
15 to 50’ scanner and encoder cables available
Console includes
o 16 Digit keypad
o 2 line display

Scanning Devices CX6 Scanner & Encoder
General Purpose Registration Mark Scanner
Optimized for color contrast detection
NPN Transistor Collector sinks current to power
supply minus, 100 milliamps MAX
Selection Switch for Light mark on dark background
or Dark mark on light background
Multi-turn adjustment dial
Quick Disconnect cables, lengths 15 to 50’
Vertical and Horizontal Orientation
Scanning Devices Encoder
o Rotary shaft
o 600 PPR

*alternative specialty scanners available for low contrast print
applications

Scanning Devices, Inc. - P.O. Box 192, Lexington, MA 02420 - 781-272-5135, mail@scanningdevices.com