Image Forming System Sheet Bunch Weight Recognition
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Solution Overview
Problem
Inkjet printing systems face challenges in discharging heavy stacks of sheets due to the weight of ink, leading to potential loss of synchronization and failure in discharging the sheet bunch to a stack tray.
Innovation Solution
An image forming system with a recognizing section to assess the weight of the sheet bunch and adjust the upper limit of sheets per bunch, ensuring reliable discharge by modifying the sheet bunch formation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If sheets are printed with a large amount of ink, then printing quality is improved, but sheet weight increases causing discharge failure
Solution Approach 1:
The system performs preliminary weight recognition of the sheet bunch before discharge. The recognizing section measures the weight in advance, and based on this information, the control section adjusts the discharge parameters or prevents discharge if the weight exceeds the threshold, avoiding discharge failure before it occurs.
Solution Approach 2:
The system implements a feedback mechanism where the recognizing section continuously monitors sheet bunch weight, and this information is fed back to the control section which adjusts the discharge operation accordingly. When weight exceeds the threshold, the system modifies the discharge parameters to ensure successful discharge.
2Productivity
If multiple heavy sheets are stacked to form a bunch, then productivity is improved, but discharge reliability deteriorates
Solution Approach 1:
The system performs preliminary weight recognition of the sheet bunch before discharge. The recognizing section measures the weight in advance, and based on this information, the control section adjusts the discharge parameters or prevents discharge if the weight exceeds the threshold, avoiding discharge failure before it occurs.
Solution Approach 2:
The system implements a feedback mechanism where the recognizing section continuously monitors sheet bunch weight, and this information is fed back to the control section which adjusts the discharge operation accordingly. When weight exceeds the threshold, the system modifies the discharge parameters to ensure successful discharge.
3Force
If the drive force is increased to handle heavy sheets, then discharge capability is improved, but synchronization loss risk increases
Solution Approach 1:
The system performs preliminary weight recognition of the sheet bunch before discharge. The recognizing section measures the weight in advance, and based on this information, the control section adjusts the discharge parameters or prevents discharge if the weight exceeds the threshold, avoiding discharge failure before it occurs.
Solution Approach 2:
The system dynamically adjusts discharge parameters based on real-time weight feedback. When heavy sheets are detected, the control section modifies discharge speed, acceleration, and force parameters to match the actual load conditions, preventing both discharge failure and motor synchronization loss.
Data Source
AI summary
To enable a bunch of sheets to be reliably discharged to a stack tray, also in the case where weight of the bunch of sheets formed on a processing tray is large, upon receiving a printing command, a main body control section checks information on an ink discharge amount in printing on a sheet, the number of sheets, sheet type and printing mode (two-side/one-side). By this means, the section recognizes weight of the bunch of sheets formed on the processing tray, and when determining that the weight is heavier than predetermined weight, deceases an upper limit value of the number of sheets of a bunch of sheets formed at a time to report to a user.