Digital Printing Web Tracking with Multi-Track Synchronized Observation
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Solution Overview
Problem
Digital printing processes lack flexibility in organizing the printing of repeating motifs on a web, leading to inefficient use of web material and potential errors in image quality monitoring.
Innovation Solution
The method involves displaying motifs in multiple tracks with varying repeats and synchronizing cameras with each track to record and render still images, allowing for efficient web material usage and real-time quality assessment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If motifs are printed in a single track with fixed repeat, then the printing process is simple to organize, but web material cannot be completely filled leading to waste
Solution Approach 1:
The printing process is divided into multiple tracks (first track, second track, etc.), each with its own repeat pattern. This segmentation allows different portions of the web to be filled independently, eliminating wasted space and enabling complete utilization of the web material while maintaining organizational simplicity within each track.
Solution Approach 2:
The repeat pattern is made dynamic by allowing it to change from track to track. Each track can have a customized repeat length and motif arrangement, enabling the system to adapt to different web widths and printing requirements, thus completely filling the web material without waste.
2Reliability
If web observation camera is synchronized with single repeat, then image quality monitoring is straightforward, but multiple tracks with varying repeats cannot be monitored effectively
Solution Approach 1:
The web observation system is segmented into multiple camera units, with each camera assigned to monitor a specific track. Each camera is synchronized with the repeat pattern of its assigned track, enabling accurate image quality monitoring for each track independently while managing synchronization complexity through division of labor.
Solution Approach 2:
The web observation system is designed to handle multiple tracks with varying repeats using a standardized camera and synchronization approach. Each camera can be configured to work with different repeat patterns, making the system universally applicable to multiple tracks while maintaining monitoring accuracy.
3Productivity
If motifs are arranged to completely fill web area, then web material utilization is maximized, but camera synchronization becomes more complex
Solution Approach 1:
The web is divided into multiple tracks, each independently filled with motifs according to its own repeat pattern. This segmentation allows complete utilization of the web area while simplifying the synchronization task for each camera, as each camera only needs to handle one track's repeat pattern rather than the entire web.
Solution Approach 2:
Each track is optimized locally with its own repeat pattern and motif arrangement to completely fill the web area. The camera synchronization is similarly optimized locally for each track, creating a balance between high web utilization and manageable synchronization complexity through localized optimization.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach minimizes web material consumption and enables immediate error detection and correction, optimizing the printing process by ensuring complete filling of the web area and stable image representation on the display.
Implementation Method 1
images of the printed motifs are continually recorded with a camera
Implementation Method 2
rendered as still images on a display for web observation
Data Source
AI summary
A method for digital printing on a running printing material web (10), wherein repeating motifs (a, b, c) are continually printed on the web and images of the printed motifs are continually recorded with a camera and rendered as still images (a, b, g) on a display (14) for web observation, with the motifs displayed next to one another in a plurality of tracks (A, B, C) and with a repeat that changes from track to track, and in that the images for web observation are recorded track by track and synchronously with the repeat applicable to the respective track.