Air Purger Detection in Fluid-Ejection Carriage Setup
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Solution Overview
Problem
Existing fluid-ejection devices, particularly CISS systems, face issues with air purging during initial setup, leading to potential device damage, poor user experience, and reduced operational lifetime due to improper or absent air purging processes.
Innovation Solution
A system for detecting the status of an air purger and engageable lock in fluid-ejection devices, allowing selective use of an air purger or backup system to ensure proper air purging by actuating the carriage to specific positions and comparing distances to thresholds, ensuring accurate detection and effective air removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual air purging is performed during initial setup, then air can be removed from fluidic tubes, but device damage may occur and user experience deteriorates due to improper purging
Solution Approach 1:
The system automatically detects air purger status and executes air purging operations without requiring manual user intervention. The controller monitors the air purger's presence and engageable lock status, then autonomously performs the purging sequence, eliminating the need for users to manually operate the air purger while ensuring proper air removal from fluidic tubes.
Solution Approach 2:
The system implements feedback mechanisms by detecting the air purger's status (presence and engageable lock position) before executing the air purging operation. This feedback ensures that the air purger is properly installed and engaged before the purging process begins, preventing device damage and ensuring reliable operation.
2Reliability
If air purger is used to remove air from fluidic tubes, then air purging can be performed, but device damage may occur if purging is improper or absent
Solution Approach 1:
The system performs preliminary detection of the air purger's status (presence and engageable lock position) before executing the air purging operation. This preliminary action ensures that the air purger is properly installed and engaged, preventing device damage that could occur from improper or absent purging while ensuring effective air removal from fluidic tubes.
Solution Approach 2:
The system implements a backup purge system that serves as a protective measure in case the primary air purger fails or is not properly installed. This beforehand cushioning ensures that air purging can still be performed effectively, preventing device damage from air remaining in the fluidic tubes even if the primary purging mechanism fails.
3Measurement precision
If engageable lock status is monitored, then air purger status can be accurately detected, but detection complexity increases
Solution Approach 1:
The system replaces complex mechanical detection mechanisms with electronic sensing. The controller uses electronic detection to monitor the air purger's presence and engageable lock status, achieving accurate status detection while minimizing mechanical complexity. This substitution maintains measurement precision while reducing overall device complexity.
Data Source
AI summary
In some examples, a fluid-ejection device can include a fluidic tube to fluidically connect to a fluid supply, a carriage having a fluidic interconnector fluidically connectable to the fluidic tube and movable between a first position and a second position, a receiver to receive an air purger, wherein the air purger, when present, is coupled to the receiver and fluidically connectable to the fluidic interconnector, and a controller to cause the carriage to actuate from the first position to the second position, determine a location of the carriage at the second position, and based on the location of the carriage at the second position, detect a status of the air purger, a status of an engageable lock in the air purger, or both.