Quality control system in a spinning mill

A quality control system in a spinning mill having a series of yarn processing steps, the system comprising:

• a communication network connecting respective processing steps of the series of processing steps for communication therebetween;
• abnormality detection means, associated with each of the steps, for detecting an abnormality of yarn;
• and
• means for communication through the network and between the respective processing steps for tracing the cause of a yarn abnormality back to a processing step provided previous to the processing step associated with the abnormality detection means.

A quality control method in a spinning mill having a plurality of sequential yarn processing steps including first and second yarn processing steps for processing a yarn material in the first yarn processing step and, thereafter, in the second yarn processing step, a communication network connecting the plurality of processing steps for communication therebetween, abnormality detection means associated with the second processing step for detecting an abnormality of yarn processed by the second processing step, means for checking the operation of the second processing step;

• and means for communicating between the first and second processing steps through the communication network, the method comprising the steps of:
• processing yarn in the plurality of processing steps;
• detecting an abnormality of yarn processed by the second processing step;
• checking the operation of the second processing step upon a detection of an abnormality of yarn processed by the second processing step;
• and
• communicating information for tracing the cause of the yarn abnormality through the communication network, from the second processing step to the first processing step upon the step of checking the operation of the second processing step revealing that the second processing step operates substantially correctly.