Textile Machine Bobbin Supply Control via Dynamic Position Evaluation
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Solution Overview
Problem
Textile machines face inefficiencies in supplying cross-coil sleeves due to existing sensors' inability to distinguish between different sleeves, leading to incorrect sleeve assignments and increased waiting times, which reduces productivity.
Innovation Solution
A procedure where service units on a textile machine record and evaluate the transfer time, transport speed, and position of cross-coil sleeves from a machine-long feeding device, ensuring accurate assignment and timely delivery by controlling handling agents based on these parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional sensors (optical approximation switches or capacitive approximation switches) are used to detect sleeve presence, then the detection function is simple and reliable, but the sensors cannot distinguish between different sleeves, leading to incorrect sleeve assignments
Solution Approach 1:
The patent introduces an intermediary evaluation process that mediates between the simple detection sensor and the sleeve assignment system. The control device evaluates sensor signals alongside position information from the transport device to determine which service unit should receive which sleeve, preventing incorrect assignments without requiring complex identification sensors.
Solution Approach 2:
The system implements feedback by continuously monitoring sensor signals and comparing them with the current transport state and service unit positions. This feedback loop allows the control device to dynamically adjust sleeve assignment decisions, ensuring that sleeves are assigned to the correct service units even with simple detection sensors.
2Reliability
If the second service unit suppresses its sleeve request to allow the first service unit to receive its assigned sleeve, then sleeve assignment accuracy is maintained, but the waiting time increases and productivity decreases
Solution Approach 1:
The patent applies dynamics by making the sleeve request suppression decision variable rather than fixed. The control device dynamically determines whether to suppress the second service unit's request based on real-time evaluation of sensor signals, transport device state, and service unit positions, allowing the system to optimize between accuracy and productivity in each specific situation.
Solution Approach 2:
The system changes the parameter of request suppression from a static rule (always suppress) to a dynamic parameter controlled by the evaluation process. Based on evaluated parameters such as sleeve position, service unit position, and transport speed, the control device decides whether suppression is necessary, thereby adjusting the timing parameters to balance accuracy and productivity.
3Productivity
If multiple service units operate simultaneously with a machine-long feeding device, then the supply speed and productivity are improved, but the risk of incorrect sleeve assignment increases due to inability to distinguish between sleeves for different service units
Solution Approach 1:
The patent segments the sleeve supply control into service-unit-specific portions by evaluating which service unit should receive which sleeve based on position and transport state. This segmentation allows multiple service units to operate simultaneously while maintaining accurate assignment, as each unit's entitlement to a sleeve is independently determined through the evaluation process.
Solution Approach 2:
The control device acts as an intermediary that coordinates between multiple service units and the feeding device. It evaluates sensor signals and transport state to mediate sleeve distribution, ensuring that even with simultaneous operations, each service unit receives the correct sleeve through the intermediary evaluation and control mechanism.
Data Source
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AI summary
The invention relates to a method for supplying a plurality of work stations (4) of a cross-wound textile machine (1) with cross-wound bobbins (17, 17A), wherein at least two service units (5, 5A, 5B, 5C) supplying the work stations (4) with cross-wound bobbins (17, 17A) are supplied by a machine-length feeding device (11, 12), wherein when a cross-wound bobbin (17, 17A) is requested by a service unit (5, 5A, 5B, 5C), a cross-wound bobbin (17, 17A) is assigned to this service unit (5, 5A, 5B, 5C) and transferred to the feeding device (11, 12).According to the invention, the time of transfer of the cross-wound spool (17, 17A) to the feeding device (11, 12), the transport speed of the feeding device (11, 12), and the position and speed of the requesting service unit (5, 5A, 5B, 5C) are detected and evaluated, and the handling means of the requesting service unit (5, 5A, 5B, 5C) are controlled depending on the evaluation such that the requesting service unit (5, 5A, 5B, 5C) receives the cross-wound spool (17, 17A) assigned to it. The invention also relates to a textile machine (1) for producing cross-wound spools for carrying out the method.