CORE YARN SPINNING MACHINE, METHOD OF DETERMINING PRESENCE OR ABSENCE OF CORE OF CORE YARN, AND METHOD OF SERVICING IN CORE YARN SPINNING MACHINE

摘要

A core yarn spinning machine (1) having a spinning apparatus (9) spinning a core yarn and a winding device (12) winding up the spun core yarn (10), comprising a slab catcher (35) determining the presence or absence of the core of the core yarn (10). In the spinning apparatus (9), the spun core yarn (10) is led into the slab catcher (35) in a pre-winding time from the start of the spinning of the core yarn (10) to the start of winding of the core yarn (10) by the winding device (12). When the core yarn is led into the slab catcher, the presence of the core is explicated more than in a time after the winding of the core yarn (10) is started by the winding device (12).