Printer Malfunction Diagnosis via Test Printout Analysis
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Solution Overview
Problem
Printers lack an efficient method for diagnosing and correcting print defects, leading to unnecessary component replacements, increased downtime, and high consumable costs, as operators rely heavily on subjective quality monitoring and manual detection.
Innovation Solution
A printer with a malfunction diagnosis system that combines subjective user input with automatic analysis using a sensing device to generate and analyze test printouts, identifying the root cause of print defects through an integrated expert system, allowing for targeted corrections and reducing operator reliance on experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual detection and subjective quality monitoring are used, then operator experience and judgment are required, but this leads to increased downtime and unnecessary component replacements
Solution Approach 1:
The printer performs self-diagnosis by automatically generating test printouts and analyzing them to identify print defects and their causes. The system monitors its own performance without requiring external operator intervention for each defect detection, enabling autonomous troubleshooting and reducing downtime.
Solution Approach 2:
The system continuously monitors print quality by analyzing test printouts and provides feedback about defect causes to the controller. This closed-loop feedback mechanism allows the printer to identify issues and adjust operations automatically, reducing the time lost to manual detection and unnecessary component replacements.
2Reliability
If manual detection methods are used, then operator judgment is relied upon, but this increases consumable costs due to unnecessary component replacements
Solution Approach 1:
The patent replaces manual operator detection with an automated sensing device that objectively measures print quality parameters. This substitution of mechanical/manual inspection with automated optical/electronic measurement enables precise defect detection without human judgment, reducing unnecessary component replacements and consumable waste.
Solution Approach 2:
The system creates test printouts as copies or representations of actual print jobs to analyze defect patterns. By examining these controlled test outputs, the system can identify root causes of defects without needing to analyze every production print, reducing consumable usage while maintaining high detection accuracy.
3Measurement precision
If automated sensing device analysis is implemented, then objective measurement is achieved, but device complexity increases
Solution Approach 1:
The sensing device and analysis system serve multiple functions: they detect various types of print defects, identify their causes, and provide feedback for correction. By making the automated system multi-functional, the patent reduces the need for separate specialized devices for each detection task, thereby limiting the increase in overall system complexity while maintaining high measurement precision.
4Reliability
If test printout generation and analysis is performed, then root cause identification is achieved, but productivity decreases due to additional processing steps
Solution Approach 1:
The system performs preliminary analysis by generating and examining test printouts before addressing actual print defects. By proactively identifying potential issues and their root causes through controlled test printing, the system can prevent defects from affecting production, thereby maintaining productivity while improving diagnosis accuracy.
Data Source
AI summary
A malfunction diagnosis system of a printer is provided. A printer controller receives malfunction-related input by the user from an input device, which user input specifies a print defect perceptible to the user. It generates image data representing a test print job in response to the user input specifying the perceptible print defect, and forwards the test print job image data to the printing unit to produce a corresponding test printout. Measurement data output from a sensing device as measured on the test printout is received and analyzed, and information indicative of a cause for the print defect based on the analyzed measurement data output from the sensing device is output.