Liquid Ejecting Apparatus Post-Cutting Transport Control
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Solution Overview
Problem
Existing liquid ejecting apparatuses face issues with medium movement during cutting, leading to liquid landing position deviations, which existing methods attempt to mitigate by limiting cutter speed but still result in potential landing failures.
Innovation Solution
A liquid ejecting apparatus with a transporting unit, an ejecting unit, and a cutting unit, where the control unit executes specific transport operations before and after cutting to correct medium position deviations, including post-cutting and pre-cutting transport operations to adjust the medium's position relative to the cutting unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the cutter movement speed is limited to suppress medium movement during cutting, then the liquid landing position accuracy is improved, but the cutting time increases
Solution Approach 1:
The system performs preliminary actions by transporting the medium to a predetermined position before cutting, and then performing a post-cutting transport operation to adjust the medium position after cutting but before liquid ejection. This prepares the system in advance to handle medium movement without requiring slow cutting speeds.
Solution Approach 2:
The control unit monitors the medium position during and after cutting, and adjusts the post-cutting transport distance based on the actual medium position. This feedback mechanism ensures accurate liquid landing position while allowing the cutter to operate at optimal speeds.
2Productivity
If the cutter moves quickly to improve productivity, then the cutting time is reduced, but the medium movement during cutting causes liquid landing position deviation
Solution Approach 1:
The system performs preliminary transport operations to position the medium correctly before cutting begins, and then executes a post-cutting transport operation to compensate for any medium movement. This allows the cutter to move quickly while the transport operations ensure accurate liquid landing positions.
Solution Approach 2:
The control unit dynamically adjusts the post-cutting transport distance parameter based on the medium position after cutting. By changing this parameter, the system compensates for medium movement caused by high-speed cutting, maintaining liquid landing accuracy without sacrificing cutting speed.
3Manufacturing precision
If the medium is transported by a long distance after cutting to ensure position accuracy, then the liquid landing position accuracy is improved, but the overall processing time increases
Solution Approach 1:
The system performs a post-cutting transport operation that transports the medium by a distance that is sufficient to compensate for cutting-induced movement but is optimized to be as short as necessary. This partial action approach ensures adequate position correction without excessive transport time.
Solution Approach 2:
The control unit adjusts the post-cutting transport distance parameter based on actual medium position measurements. By optimizing this parameter to the minimum necessary distance for accurate liquid placement, the system achieves position accuracy while minimizing the time loss from transport operations.
Data Source
AI summary
A liquid ejecting apparatus includes a transporting unit which can transport a medium along a first direction; an ejecting unit which can eject liquid; a cutting unit which is provided on a downstream side in the first direction compared to the ejecting unit, and can cut the medium; and a control unit which can execute an ejecting operation in which the liquid is ejected onto the medium using the ejecting unit, and a cutting operation in which the medium is cut using the cutting unit, in which the control unit executes a post-cutting transport operation in which the medium is transported using the transporting unit between executing of the cutting operation and executing of the ejecting operation.