Printing Device Resumption Control via Position Mark Feedback
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Solution Overview
Problem
Existing printing technologies face challenges in resuming printing without leaving a blank portion between the last page printed before interruption and the first page printed after resumption, leading to potential paper damage.
Innovation Solution
A printing device and system that include a conveyance unit, a printing unit, and a control unit. The control unit features a printing interruption control unit that ensures the printing unit completes printing of the last page before interruption and prints a position mark on the next page for resumption, while the conveyance control unit decelerates and stops the printing medium, preventing a blank page from appearing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If printing is interrupted and then resumed on the same surface, then printing operation can be continued, but a blank portion appears between the page printed before interruption and the page printed after interruption
Solution Approach 1:
The system performs preliminary actions by printing a position mark on the printing medium before interruption, and by controlling the conveyance unit to decelerate and stop at a specific position. When printing is resumed, the system reads this pre-printed position mark and uses it to accurately position the printing head, thereby preventing blank portions without requiring complex real-time adjustments during resumption.
2Loss of time
If the conveyance unit continues conveying the printing medium at constant speed after interruption, then printing can be quickly resumed, but a blank portion appears between printed pages
Solution Approach 1:
The system employs feedback by reading the position mark that was printed on the printing medium before interruption. This feedback information about the original printing position is used to control the conveyance unit's deceleration and stopping position, ensuring that when printing resumes, the printing head is correctly positioned relative to the printing medium, thus preventing blank portions while enabling quick resumption.
3Productivity
If the printing unit resumes printing immediately after interruption, then productivity is maintained, but the printing position may be inaccurate causing blank portions
Solution Approach 1:
The system performs preliminary actions by printing a position mark before interruption and controlling the conveyance unit to stop at a specific position. When printing is resumed, the system reads this pre-printed position mark and uses it to accurately position the printing head, thereby preventing blank portions without requiring complex real-time adjustments during resumption.
Solution Approach 2:
The system employs feedback by reading the position mark that was printed on the printing medium before interruption. This feedback information about the original printing position is used to control the conveyance unit's deceleration and stopping position, ensuring that when printing resumes, the printing head is correctly positioned relative to the printing medium, thus preventing blank portions while enabling quick resumption.
Data Source
AI summary
When a printing interruption cause occurs during printing of an image on a printing medium, printing of a page being printed is completed, and further only a position mark is printed on a printing resumption page. Then, a printing unit is stopped, and a conveyance speed is decelerated to stop conveyance of the printing medium. Next, the printing medium is rewound so that printing is resumed from the printing resumption page. Thereafter, the conveyance speed is accelerated to a predetermined speed, and printing is resumed from the printing resumption page on which the position mark is printed.