Method and apparatus for detecting fluctuations of monitoring standard of thread-knotting monitor in auto-winder

摘要

A method and an apparatus for detecting fluctuations of a monitoring standard of a thread-knotting monitor of an automatic thread- knotting machine in an auto-winder by detecting if a number of operations of the thread-knotting monitor is over a predetermined range.P P The number of thread-knottings performed in the automatic thread- knotting machine of the auto-winder and the number of operations of the thread- knotting monitor in said number of thread knottings are counted, a signal is emitted at the moment that the number of operations of the thread- knotting monitor reaches a predetermined upper limit, while a signal is emitted when the number of operations of the thread-knotting monitor at the moment that the number of the thread-knottings reaches a predetermined value falls under a predetermined lower limit, and fluctuations of the monitoring standard of the thread-knotting monitor are detected by means of the two signals.