A textile machine and associated method are provided for operating the textile machine that includes a plurality of workstations, wherein each workstation includes at least one stepper motor configured to drive an element at the workstation. The method includes measuring a load variable, for example a load angle, of the stepper motor and detecting an approach of the element to an end position based on changes to the load variable.

A yarn producing apparatus for producing carbon nanotube (CNT) yarn by aggregating CNT fibers. A front roller continuously draws the CNT fibers from at least one CNT forming substrate, a yarn producing unit aggregates the CNT fibers drawn by the front roller, and a status monitors a state of the CNT fibers drawn from the CNT forming substrate, or the CNT yarn.

A yarn producing apparatus for producing carbon nanotube (CNT) yarn by aggregating CNT fibers. A front roller continuously draws the CNT fibers from at least one CNT forming substrate, a yarn producing unit aggregates the CNT fibers drawn by the front roller, and a status monitors a state of the CNT fibers drawn from the CNT forming substrate, or the CNT yarn.

A knit fabric production method includes a step of producing a knit fabric K1 from an untwisted yarn Y0 while producing the untwisted yarn Y0 by disposing a fiber bundle FB around a linear core member CP formed of a soluble polymer, falsely twisting the fiber bundle FB by using an air flow swirling in a predetermined first direction and simultaneously causing open end fibers OF to adhere to an outer circumferential surface of the falsely twisted fiber bundle FB by using an air flow swirling in a second direction opposite the first direction, and untwisting the falsely twisted fiber bundle FB.

A knit fabric production method includes a step of producing a knit fabric K1 from an untwisted yarn Y0 while producing the untwisted yarn Y0 by disposing a fiber bundle FB around a linear core member CP formed of a soluble polymer, falsely twisting the fiber bundle FB by using an air flow swirling in a predetermined first direction and simultaneously causing open end fibers OF to adhere to an outer circumferential surface of the falsely twisted fiber bundle FB by using an air flow swirling in a second direction opposite the first direction, and untwisting the falsely twisted fiber bundle FB.

A yarn-forming element is provided for a roving machine that produces a roving from a fiber structure using compressed air. The yarn-forming element includes an intake opening for fibers of the fiber structure, an outlet for emergence of the roving produced from the fiber structure, and a draw-off channel that connects the intake opening and the outlet. A front end surrounding the intake opening is formed as a first truncated cone in at least some sections thereof. The first truncated cone includes a larger base surface and a smaller opposite cover surface that is adjacent the draw-off channel. An angle (a) between a lateral line of the first truncated cone and an axis of the first truncated cone is less than 90 and greater than 70.

A yarn-forming element is provided for a roving machine that produces a roving from a fiber structure using compressed air. The yarn-forming element includes an intake opening for fibers of the fiber structure, an outlet for emergence of the roving produced from the fiber structure, and a draw-off channel that connects the intake opening and the outlet. A front end surrounding the intake opening is formed as a first truncated cone in at least some sections thereof. The first truncated cone includes a larger base surface and a smaller opposite cover surface that is adjacent the draw-off channel. An angle (a) between a lateral line of the first truncated cone and an axis of the first truncated cone is less than 90 and greater than 70.

A yarn producing apparatus that produces high-density carbon nanotube yarn at high speed. The yarn producing apparatus includes: a substrate support supporting a carbon nanotube (CNT) forming substrate; a winding device configured to continuously draw CNT fibers from the CNT forming substrate supported on the substrate support and to allow the CNT fibers to run; and a yarn producing unit provided between the substrate support and the winding device to directly take in the CNT fibers drawn by the winding device and twist the taken-in CNT fibers. The yarn producing unit false-twists the CNT fibers with a swirl flow of compressed air.

A yarn producing apparatus that produces high-density carbon nanotube yarn at high speed. The yarn producing apparatus includes: a substrate support supporting a carbon nanotube (CNT) forming substrate; a winding device configured to continuously draw CNT fibers from the CNT forming substrate supported on the substrate support and to allow the CNT fibers to run; and a yarn producing unit provided between the substrate support and the winding device to directly take in the CNT fibers drawn by the winding device and twist the taken-in CNT fibers. The yarn producing unit false-twists the CNT fibers with a swirl flow of compressed air.

A yarn producing apparatus that produces carbon nanotube yarn at high speed includes a yarn producing unit that aggregates running carbon nanotube fibers. The yarn producing unit includes a nozzle body, a first nozzle provided in the nozzle body to generate a first swirl flow, with compressed air, in a direction orthogonal to the direction of the carbon nanotube fibers running, and a second nozzle provided in the nozzle body to generate a second swirl flow, with compressed air, in a direction orthogonal to the direction of the carbon nanotube fibers running and opposite to the direction of the first swirl flow. The first nozzle and the second nozzle are provided at positions different in the direction of the carbon nanotube fibers running in the nozzle body.