Excellent print quality thanks to innovative measuring and control systems – the hallmark of the new Rapida large-format generation
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Regardless of whether you are handling long runs or a multitude of small and repeat jobs, high print quality is the be-all and end-all when it comes to ensuring customer satisfaction. The measuring and control systems of the new Rapida large-format generation offer ideal prerequisites for production in optimum quality, at high speeds and with lightning-fast makeready processes. At the same time, they significantly reduce start-up and production waste and make a decisive contribution to environmental protection through their economical use of substrates, inks, process materials and energy.?
Convenient online measurement and control with the ErgoTronic system
With the ErgoTronic system, colour and register are measured and controlled outside the press at the ErgoTronic console – by way of colour bars, or directly in the printed image. After each measurement, the operator can simply confirm the suggested corrections with the press of a button. The adjustment process itself then runs fully automatically.?
The ErgoTronic family comprises the following online systems:?
Register measurement:?
Colour measurement:
ErgoTronic ColorControl is also used for referencing the systems for inline measurement and control.
Perfect inline colour control with QualiTronic ColorControl
The most frequently used inline measuring and control system on Rapida presses is QualiTronic ColorControl. It provides an ideal way to
To this end, the system scans every single printed and coated sheet after the last printing unit or coater – in other words, directly after the printing and finishing process. A high-resolution 4K camera, LED illumination and the efficient sheet guiding system are the basis for perfect measurement results.?
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The colour bars on the sheet are scanned and measured during production. The results of these measurements are then used for fast, dynamic inline colour control. The operator maintains a full overview at all times, because the measured ink densities and the control process itself are visualised on the ErgoTronic console in real time.?
The gold standard: system solutions for inline sheet inspection?
With QualiTronic PrintCheck, PDFCheck and PDF HighRes, Koenig & Bauer offers three different systems for sheet inspection.? All three systems control the ink densities, monitor the course of production and realise inline sheet inspection – in line with the individual user’s quality needs and expectations.??
In the case of QualiTronic PDFCheck, a printed sheet is compared with the pre-press PDF file during makeready. This then serves as a reference for the entire run. During production, the system compares every sheet with the reference – at a resolution of up to 70?dpi. As soon as any differences between the newly printed sheets and the reference are detected, the operator is prompted to intervene.
QualiTronic PDFHighRes, with its two additional 8K cameras and a resolution of up to 260?dpi, is also the only system for large-format sheetfed offset presses to meet the strict quality standards of the pharmaceuticals industry.
Clear advantages of the inline systems for production monitoring and sheet inspection are:
The measuring and control systems described are in daily use on practically every Rapida 145 and Rapida 164 press. Further quality control systems are available for incorporation into the large-format Rapidas where this is necessary to cater to individual user requirements. These include
to name just a few.?
The Koenig & Bauer solutions for quality measurement and control are designed as modular systems – with tailored and individually scalable variants to suit every application and every budget. The objective is to provide printers with support with monitoring production quality, and to enable them to meet the growing customer demands for both ultimate print quality and ever shorter delivery times.
Learn more now
More interesting information about the new Rapida large-format generation can be found at koenig-bauer.com/en/newdimension. At the same time, make sure you don't miss watching the recordings of our webinar series “Technology Deep Dive – The New Dimension in Large Format”.
Printing Theory and Technology Development
2 年Control of critical variables is very important. Control can be done in many ways. It is not only measure and adjust but can be done by the design of a capable process that prevents variation. It also depends on the required tolerances. Registration is very stable on press but the tolerance required is so tight that closed loop control needs to be used to keep the very small variations within the tight tolerance. Ink feed does not actually require a tight tolerance, although it is better if the existing tolerances were a bit smaller. If one has a tolerance of solid print density of +/- 0.05, that is about +/- 6% of ink on the print. That is a total range of about 12% ink volume. That is not a tight tolerance. Measuring and adjusting works. It corrects for disturbances. But if one has a positive ink feed, that can feed ink withing the 12% range, then the press will run within tolerance without the need for an operator or a closed loop system to make any adjustment. Having a positive ink feed, prevents disturbances from affecting print density. Having a positive ink feed, with the correct presetting values, will result in the shortest makeready response. Faster than measuring and adjusting. This is the future.