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News Release from: KBA | Subject: Qualitronic II In-Line Sheet Inspection
Edited by the Printingtalk Editorial
Team on 06 July 2004
In-Line Sheet Inspection Spots Colour
Deviation
KBA has launched a new in-line sheet inspection system, Qualitronic II.
KBA has launched a new in-line sheet inspection system, Qualitronic II Demonstrated at Drupa 2004 on a new-generation Rapida 105 sheetfed press, Qualitronic II is available for all Rapida press formats - half, medium and large running at claimed speeds as high as 18,000 sheets per hour (sph)
This article was originally published on Printingtalk on 9 Feb 2004 at 8.00am (UK)
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The Qualitronic II utilises a colour camera that is mounted near the delivery area and aimed at the impression cylinder through a narrow slit in the floor plate.
The uniform brightness that is needed for consistent inspection results is achieved with water-cooled LED illumination installed near the impression cylinder.
During the press run, each printed sheet is scanned at what KBA described as ultra-high resolution.
Depending on the press format that is said to represent a resolution of approximately 0.15mm per pixel on the Rapida 74 and 1mm per pixel on the Rapida 205.
Within these areas, the system is claimed to detect even the slightest colour deviation, distinguishing over 16 million different colours.
In addition to segregating imperfect sheets from the run, the Qualitronic II system reduces waste by warning the operator of deviations in the press run, such as if the colours start to fade due to lack of ink.
The operator is able to react before large quantities of waste sheets accumulate unnecessary costs.
On presses with perfecting units, an optional second camera can be installed before the sheet turns, enabling full monitoring of both sides of the sheet.
Image data are evaluated in a computer system developed specifically for KBA.
The press operator is able to judge and maintain the quality of work on the monitor screen.
Both transient errors, such as ink splashes, water spots, paper defects, and more permanent deviations, such as over or under inking of individual colours or tinting, are recognised and displayed sheet by sheet.
The press operator determines the inking that is to be considered good production.
An in-line function evaluates the specified 'good' sheet, which is subsequently used as the reference for the production run.
A sensitivity setting also enables permissible tolerances in inking to be defined for the run. Request a free brochure from KBA ...
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