Auto-Splice Printhead Maintenance for Roll Paper Changeovers
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Solution Overview
Problem
Conventional printing apparatuses with auto-splice functions fail to perform maintenance when roll paper is replaced, leading to potential print quality issues due to variations in print processes and head usage before and after paper replacement.
Innovation Solution
A printing apparatus with an auto-splice function that includes a maintenance mechanism, a maintenance content control unit, and a splicing unit to determine and perform maintenance based on inspection results, ensuring suitable maintenance for the new roll paper and printhead groups.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If maintenance is not performed when roll paper is replaced using auto-splice function, then printing efficiency is maintained and printing time is reduced, but print quality may deteriorate due to variations in print process and head usage before and after paper replacement
Solution Approach 1:
The system performs inspection pattern printing and maintenance determination in advance before the actual roll paper replacement occurs. By proactively assessing printhead status and predicting maintenance needs based on the scheduled print process after replacement, the system prepares maintenance actions beforehand, ensuring print quality without disrupting the continuous printing workflow
Solution Approach 2:
The maintenance determination criterion is made dynamic and adaptable based on the specific print process scheduled to be executed after roll paper replacement. The system adjusts maintenance requirements according to the actual usage conditions of different printhead groups, rather than applying fixed maintenance rules, thereby optimizing both print quality and printing efficiency
2Manufacturing precision
If maintenance is performed on all printheads when roll paper is replaced, then print quality is ensured, but printing time increases and unnecessary maintenance occurs
Solution Approach 1:
The system applies maintenance selectively to specific printhead groups based on their actual usage status and the scheduled print process after roll paper replacement. Instead of uniformly maintaining all printheads, the system identifies which printhead groups require maintenance and which do not, localizing maintenance actions to where they are actually needed, thereby reducing unnecessary maintenance time
Solution Approach 2:
The system performs only the necessary portion of maintenance required for ensuring print quality, rather than performing complete maintenance on all printheads. By determining maintenance needs based on actual printhead usage and scheduled print processes, the system avoids excessive maintenance actions that would waste time while still achieving sufficient print quality
3Device complexity
If maintenance criterion is not adjusted based on scheduled print process after roll paper replacement, then device complexity is reduced, but maintenance appropriateness deteriorates leading to either insufficient or excessive maintenance
Solution Approach 1:
The maintenance determination criterion is made dynamic by linking it to the specific print process scheduled to be executed after roll paper replacement. The system automatically adjusts maintenance requirements based on the actual usage conditions of different printhead groups under different print processes, ensuring maintenance appropriateness without requiring complex manual intervention
Solution Approach 2:
The system automatically determines maintenance needs by itself based on inspection results and scheduled print process information, without requiring external judgment or complex control mechanisms. The printhead group usage information and print process schedule drive the maintenance determination autonomously, achieving reliable maintenance appropriateness through self-service logic
Data Source
AI summary
A printing apparatus is achieved that has an auto-splice function and is capable of performing, when roll paper is replaced, suitable maintenance taking into account a print process scheduled to be executed after replacement of the roll paper. When a splicer replaces, regarding the roll paper to be used, the preceding roll paper with the subsequent roll paper, a print control unit controls an operation of a printing unit such that an inspection pattern is printed at a tail of continuous paper unwound from the preceding roll paper, and a maintenance content control unit determines maintenance content for an inkjet head in accordance with a criterion suitable for printing on continuous paper unwound from the subsequent roll paper based on an inspection result obtained by inspection of a print image for the inspection pattern.