Fulcrum Guide Position Detection for Yarn Threading Reliability
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Solution Overview
Problem
The existing textile machines face defects due to improper movement of fulcrum guides, leading to incorrect yarn threading and packaging issues, often caused by clogging or inadequate operation of the drive unit, resulting in wasted yarn and substandard package formation.
Innovation Solution
Incorporating a detection unit, such as limit switches or proximity sensors, to determine the proper positioning of fulcrum guides, ensuring they reach target positions before yarn threading, and utilizing an automatic yarn threading device that only operates when the movement is confirmed proper, along with a notification system to alert operators of any defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a drive unit such as an air cylinder is used to move fulcrum guides between production position and yarn threading position, then the fulcrum guides can be repositioned for different operations, but the drive unit may clog due to yarn dust and fail to move the fulcrum guides properly
Solution Approach 1:
The patent introduces detection units (limit switches or proximity sensors) that detect the position of fulcrum guides and provide feedback to the controller. This feedback mechanism allows the system to verify whether the fulcrum guides have reached the desired position, enabling the controller to determine whether yarn threading should be performed based on actual position confirmation rather than relying solely on drive unit operation.
2Extent of automation
If yarn threading is performed based on predetermined time elapsed from drive unit operation start, then the threading process can be automated, but yarn threading may fail when the fulcrum guides are displaced from the desired position
Solution Approach 1:
The detection units provide real-time position feedback to the controller, allowing the automated threading process to adapt to actual fulcrum guide positions. The controller uses this feedback to determine whether threading conditions are met, ensuring accuracy while maintaining automation.
Solution Approach 2:
The system performs preliminary detection of fulcrum guide position before initiating yarn threading. The controller confirms that the fulcrum guides are at the correct position through detection unit feedback before allowing the threading operation to proceed, preventing threading errors.
3Length of moving object
If the fulcrum guides are moved over a long distance between distanced position and gathered position, then the fulcrum guides can reach different operational positions, but they are more likely to fail to reach the target position when the drive unit does not operate properly
Solution Approach 1:
The detection units are positioned to detect the fulcrum guides at specific locations (distanced position and gathered position). The feedback from these detectors allows the controller to verify whether the long-distance movement was successful, providing reliability confirmation even for extended movements.
Data Source
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AI summary
Defects that may occur when a yarn threading target member does not properly move are suppressed. A spun yarn take-up machine 1 (textile machine) processing at least one yarn Y includes a fulcrum guide 21 (yarn threading target member) to which the yarn Y is threaded, a drive unit 30 configured to move the fulcrum guide 21 between a production position and a yarn threading position, a location information detection unit 70 configured to detect information regarding movement of the fulcrum guide 21 by the drive unit 30, and a controller. The controller determines whether the movement of the fulcrum guide 21 is properly done, based on a result of detection by the location information detection unit 70.