Adaptive Yarn Piecing Cycle Times for Textile Spinning
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Solution Overview
Problem
Conventional textile machine piecing processes are inefficient due to fixed cycle times that do not adapt to yarn characteristics, leading to reduced machine efficiency and increased downtime.
Innovation Solution
The method allows variable cycle times for piecing process steps based on yarn characteristics, utilizing a control unit to adjust durations of steps like yarn end search and return, cleaning, and rewinding speeds, with self-learning capabilities to optimize efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fixed cycle times are used for all piecing process steps, then the process is simple to control, but machine efficiency is reduced due to inability to adapt to different yarn characteristics
Solution Approach 1:
The patent implements dynamic adjustment of cycle times for individual piecing process steps based on yarn characteristics. The control system varies the time duration of steps such as yarn end search, cleaning, and rewinding according to detected yarn properties, transitioning from static fixed timing to dynamic adaptive timing to improve machine efficiency without excessive complexity increase
Solution Approach 2:
The patent changes the time duration parameter of piecing process steps based on yarn characteristics. By detecting yarn properties and adjusting the cycle time parameter accordingly, the system optimizes the balance between process reliability and machine efficiency, allowing longer times for difficult yarns and shorter times for easy yarns
2Reliability
If longer cycle times are used to improve success rate of piecing steps, then reliability improves, but machine efficiency and productivity decrease
Solution Approach 1:
The patent adjusts the time duration parameter of piecing steps based on yarn characteristics to optimize the balance between reliability and productivity. By detecting yarn properties and adapting the cycle time accordingly, the system applies longer times only when necessary for difficult yarns while maintaining shorter times for easy yarns, thus improving success rates without sacrificing overall machine efficiency
Solution Approach 2:
The patent incorporates feedback mechanisms where the control system monitors the outcomes of piecing steps and adjusts cycle times accordingly. By learning from previous successes and failures, the system optimizes the timing parameters to achieve high reliability while maintaining productivity, adapting to different yarn characteristics through accumulated experience
Data Source
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AI summary
In a method for controlling a yarn start-up process for re-starting a yarn (G) on a textile machine, in particular a spinning machine (1), by means of a start-up device (5), several preparatory work steps are carried out successively in temporal sequence. Each work step is assigned a predetermined time duration within which the respective work step is carried out. The predetermined time duration for at least one of the work steps is variable, with the actual time duration of the at least one work step being determined depending on a yarn characteristic (GC) of the currently produced yarn (G) and/or depending on the utilization of the spinning device (5). A textile machine has a control unit (12) which is designed to operate the textile machine according to this method.