Printing System Post-Processing Control for Speed Adaptability
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Solution Overview
Problem
Conventional printing systems experience low productivity due to the need to stop and restart post-processing operations when changing conveyance speeds between the printing unit and the post-processing unit, especially when handling different types of printing paper sheets with varying ink drop numbers.
Innovation Solution
A printing system that includes a printing unit and a post-processing unit, where the post-processing control section only performs a suspending operation if the length of the printing medium is greater than or equal to a set inter-unit conveyance distance, allowing continuous processing and optimizing conveyance speeds based on the length of the printing medium, thereby reducing unnecessary stopping and restarting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the post-processing unit performs a suspending operation to change conveyance speed settings, then the conveyance speed can be adjusted to match different printing paper sheet types, but productivity decreases due to stopping and restarting operations
Solution Approach 1:
The control section determines in advance whether a suspending operation is necessary by comparing the length of the printing paper sheet with the inter-unit conveyance distance. This preliminary assessment allows the system to avoid unnecessary suspending operations and maintain continuous processing when possible.
Solution Approach 2:
The system dynamically changes the conveyance speed parameter based on the type of printing paper sheet being processed. By adjusting the conveyance speed to match the specific requirements of each paper type (envelope, letter, etc.), the system maintains adaptability while minimizing disruptions to productivity.
2Manufacturing precision
If the conveyance speed is changed for different printing paper sheet types, then printing quality can be optimized for each paper type, but the processing time increases due to suspending operations
Solution Approach 1:
The system optimizes printing quality by changing the conveyance speed parameter according to the specific paper type being processed. Each paper type (envelope, letter, etc.) has its own optimal conveyance speed setting that ensures proper ink deposition and printing quality.
Solution Approach 2:
The control section performs a preliminary determination of whether a suspending operation is needed by comparing paper length with inter-unit conveyance distance. This allows the system to maintain continuous processing and minimize time loss when the paper length allows for seamless speed transitions.
3Productivity
If the post-processing unit continuously processes without suspending, then productivity is maintained, but conveyance speed synchronization with the printing unit may be compromised
Solution Approach 1:
The control section dynamically adjusts the conveyance speed parameter based on real-time conditions, including the length of the printing paper sheet and the inter-unit conveyance distance. This ensures proper speed synchronization between the printing unit and post-processing unit while maintaining continuous operation.
Solution Approach 2:
The system uses feedback from the comparison between paper length and inter-unit conveyance distance to determine whether a suspending operation is necessary. This feedback mechanism ensures that conveyance speed synchronization is maintained reliably while minimizing interruptions to productivity.
Data Source
AI summary
When a printing conveyance speed at a printing unit is changed, if a length of a printing paper sheet in the conveyance direction thereof is smaller than an inter-unit conveyance distance, which is set in advance, between the printing unit and a post-processing unit, only a printing suspending operation at the printing unit is performed, and a post-processing suspending operation at the post-processing unit is not performed. On the other hand, if the length of the printing paper sheet in the conveyance direction thereof is equal to or greater than the inter-unit conveyance distance, both the printing suspending operation at the printing unit and the post-processing suspending operation at the post-processing unit are performed. In this manner, the post-processing suspending operation is omitted depending on the length of the printing paper sheet in the conveyance direction thereof.