Printer Controller Thermal Management for Media Deformation
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Solution Overview
Problem
Industrial printers with heating systems face issues with media deformation and subsequent print quality problems due to thermal expansion and inertia, particularly when stopping and starting operations between print jobs, leading to wrinkles and image quality issues.
Innovation Solution
The printer controller manages the heating module and media path by advancing and rewinding media to maintain consistent temperature and reduce thermal gradients, controlling the heating module's power and media speed to minimize deformation, and optimizing media usage for subsequent print jobs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the heating module operates continuously to maintain printing temperature, then printing throughput is maximized, but media deformation occurs due to thermal expansion and inertia when stopping and starting
Solution Approach 1:
The system performs preliminary actions by advancing the media a first distance before stopping the heating module, and then advancing it a second distance after restarting. This preliminary media advancement prepares the media path for temperature equalization, preventing deformation when the heating cycle resumes while maintaining continuous printing capability.
Solution Approach 2:
The system dynamically adjusts the heating module operation based on media position and temperature conditions. The heating module is stopped and restarted at specific media advancement stages, creating dynamic thermal cycles that equalize temperature throughout the media path, thereby preventing deformation while maintaining productivity.
2Loss of energy
If the heating module is stopped between print jobs to save energy, then energy consumption is reduced, but thermal gradients cause media deformation and print quality issues
Solution Approach 1:
The system implements periodic heating and stopping cycles synchronized with media advancement. The heating module operates periodically - advancing media a first distance, stopping heating, advancing a second distance, then restarting heating. This periodic action maintains energy efficiency while preventing thermal gradients that would degrade print quality.
Solution Approach 2:
The media advancement continues continuously through the heating stop/start cycles, ensuring the printing process remains productive. The useful action of media transport is maintained without interruption, while the heating module cycles to prevent thermal deformation, thus maintaining print quality without continuous energy consumption.
3Productivity
If the heating module temperature is increased to speed up drying/curing, then printing efficiency is improved, but thermal inertia causes greater media deformation during stop/start cycles
Solution Approach 1:
The system performs preliminary media advancement before stopping the high-temperature heating module. This preliminary action allows the media to be positioned and the heating module to be stopped before thermal inertia causes excessive deformation, enabling higher operating temperatures while maintaining precision.
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 reduces or eliminates media deformation and associated print quality issues, enabling continuous operation and maintaining image integrity by managing thermal conditions and media handling during idle periods.
Implementation Method 1
media deformation and subsequent print quality problems due to thermal expansion and inertia
Implementation Method 2
heating module to dry, cure, or fuse printing material that they deposit on a media
Data Source
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AI summary
According to one example, there is provided a printing system. The printing system comprises a print engine to print a print job on media in a print zone, a heating module to apply heat to media in a heating zone and a media handling system to move media through a media path comprising the print zone and the heating zone. The system further comprises a controller to determine when a printing operation is stopped, and when it is so determined to control the heating module to stop heating and to control the media handling system to continue advancing media through the media path until a predetermined condition is met.