Machine Description
Operating Instructions
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Subject to Technical Modifications
ITS6_135_Manual_EN.doc
Once the PDF comparison has successfully been completed, the camera
system compares each image printed during the subsequent printing op-
eration with the reference image only. In addition to the overall printed im-
age, the camera system checks other previously defined image sections for
deviations. Deviations are:
Text discrepancies (missing text, for example)
Color discrepancies (such as smeared ink, missing color).
Image discrepancies (such as different positioning, missing image,
missing label, different bar code, creases).
The camera reads and decodes the data matrix code. It sends the decoded
number and the result of the comparison to the Label Rejection Controller.
The Label Rejection Controller is installed in the finishing system.
4.6.23 Function of the camera system components
Camera module
Each printed image is fully scanned by a camera. Two LEDs illuminate the
image section in front of the camera lenses. Most of the camera module is
encapsulated so that almost no light can get to the outside, dazzling the
operators.
Incremental encoder
The incremental encoder provides the camera with the signal for the opti-
mum shot time.
Control computer
The control computer has the following tasks:
It evaluates the images taken by the camera.
It reads the Data Matrix Code.
It sends the information decoded from the Data Matrix Code to the La-
bel Rejection Controller together with the result of the evaluation
– that
is, whether the printed label is regarded as good or as bad.
It saves the last 50 shots in a cyclic buffer.
It saves the shots with deviations.
It saves the log data.
Control panel
The camera control panel permits the processes at the camera system to
be watched, and camera system adjustments to be made.