Roll Body Mounting Direction Detection in Inkjet Printers
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Solution Overview
Problem
Inkjet printers face issues with properly determining the mounted state of roll bodies, leading to incorrect feeding directions and degraded image quality due to potential misalignment of roll bodies during printing.
Innovation Solution
A determination device comprising a roll motor, transportation roller, storage unit, sensor, and determination unit that detects the rotation of the transportation roller to determine if the roll body is mounted correctly by specifying the pulling-out direction based on stored information, allowing for accurate identification of the roll body's mounting state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the roll body is mounted without directionality, then the mounting process is simple, but the feeding direction becomes incorrect causing degraded image quality
Solution Approach 1:
The roll body is designed with asymmetric features including a directionality indication (arrow) and corresponding groove structures that only align correctly in the proper mounting direction. This asymmetric design ensures that the roll body can only be mounted in the correct orientation, automatically preventing incorrect mounting while maintaining ease of installation through intuitive directional cues.
Solution Approach 2:
A directionality indication element (such as an arrow) is introduced as an intermediary visual cue between the roll body and the mounting mechanism. This intermediary feature provides clear directional information to the user during installation, ensuring correct orientation without requiring complex alignment procedures or additional detection systems.
2Device complexity
If no determination mechanism is implemented, then the device complexity is low, but the mounted state cannot be verified leading to potential printing defects
Solution Approach 1:
The determination mechanism performs a preliminary verification action during the mounting process itself, before printing begins. The detection unit checks whether the directionality indication aligns with the groove during installation, and the determination unit immediately identifies incorrect mounting. This preliminary verification prevents printing defects from occurring in the first place, eliminating the need for complex post-installation detection systems.
Solution Approach 2:
The system incorporates a feedback mechanism where the detection unit monitors the alignment between the directionality indication and the groove structure, providing real-time information to the determination unit. When misalignment is detected, the system provides immediate feedback indicating incorrect mounting, allowing for correction before printing begins. This feedback loop ensures reliability without requiring complex continuous monitoring systems.
Data Source
AI summary
A determination device that determines the mounted state of the roll body on which the medium is wound in a roll shape, includes a roll motor that rotates a rotating member on which the roll body is mounted; a transportation roller that transports the medium fed from the roll body, in a transportation direction; a storage unit that stores information which is capable of specifying a pulling-out direction of the roll body mounted on the rotating member; a sensor that detects a rotation of the transportation roller; and a determination unit that detects whether or not the roll body corresponding to the information is mounted normally. The determination unit determines that the roll body is not mounted normally, in a case where the sensor detects the rotation of the transportation roller is rotating, when the roll motor is rotated in a direction corresponding to the pulling-out direction.