Inkjet Printer Heating Rollers Duty Redistribution
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Solution Overview
Problem
Conventional inkjet printing apparatuses require extended downtime and maintenance when a halogen lamp fails, necessitating immediate shutdown and replacement, which disrupts the printing process and can lead to print quality issues.
Innovation Solution
An inkjet printing apparatus with a temperature controller that detects failures in heating devices and redistributes their duty ratios to operational heating devices, allowing the printing process to continue without interruption by compensating for the lost heat, thus enabling quick maintenance and maintaining print quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the printing process is stopped immediately when a halogen lamp failure is detected for maintenance, then the reliability of the heating system is maintained, but the productivity and uptime of the printing apparatus deteriorate due to extended downtime
Solution Approach 1:
The system changes the operational parameters of the remaining healthy heating devices by increasing their duty ratios to compensate for the failed heating device. The controller redistributes the duty ratios dynamically, allowing the printing process to continue without interruption while maintaining the required drying temperature, thus resolving the contradiction between reliability and productivity
Solution Approach 2:
The system prepares compensatory measures in advance by having multiple heating devices ready to take over the duty of a failed device. The duty ratio redistribution mechanism is pre-configured, allowing immediate compensation when failure occurs, preventing downtime and maintaining continuous operation
2Productivity
If the duty ratio of healthy heating devices is increased to compensate for a failed heating device, then the productivity and continuous operation are maintained, but the temperature control complexity and energy distribution challenges increase
Solution Approach 1:
The controller implements a feedback mechanism that continuously monitors the temperature and duty ratios of all heating devices. When a failure is detected, the system automatically adjusts the duty ratios of healthy devices based on real-time temperature feedback, ensuring stable temperature control despite the increased complexity of managing multiple heating devices with varying duty cycles
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution allows for uninterrupted printing by distributing the missing duty ratio to normal heating devices, reducing downtime and preventing print quality deterioration due to heat loss, ensuring continuous and high-quality drying even during maintenance operations.
Implementation Method 1
The heaters have halogen lamps inside, for example. The drying unit carries out feedback control of the plurality of heaters to a temperature
Implementation Method 2
a temperature detector for detecting temperature of each of the heating devices
Data Source
AI summary
When a disconnection detecting circuit detects failure, a controller of a temperature controller manipulates a duty ratio to distribute the duty ratio to normal heating rollers. Since the amount of heat decreased by failure of a heating roller can be compensated for by the other heating rollers, no defective drying will occur. It is not necessary to stop a printing process immediately when the disconnection detecting circuit detects failure, but a maintenance operation can be carried out after fully securing a preparation time for maintenance. The quick maintenance can be performed to restrain downtime of the printing apparatus.