Workstation of a two-for-one twisting or cabling machine for production of carpet yarn, including winding device having package cradle with two frame arms for rotatable mounting of an empty tube or twisting package, package drive roller for frictionally driving twisting package, yarn traversing device for traversing transfer of a yarn to the twisting package, advance roller for regulating a yarn tension, and cover in area of the advance roller with an opening for yarn guided through the yarn traversing device to the twisting package. Package cradle has at least one movable, partially rotatable frame arm and designed so an empty tube with length of at least 315 mm is insertable, that the package drive roller has length of at least 286 mm, that yarn traversing device has traversing stroke of at least 11 inches, and that opening in cover corresponds with the yarn path arising due to the traversing stroke.

A method for operating a spindle (2) of a two-for-one twisting or cabling machine which has an adjustable balloon-yarn-guide-eye (9), wherein for the operation of the spindle (2) under production conditions, the balloon-yarn-guide-eye (9) is adjusted, on the basis of a measured value (i) correlating with the energy consumption of the spindle drive (3), to a first operating position (AP.sub.1), in which a position-dependent minimum of the energy consumption of the spindle drive (3) is reached.

The present invention relates to a carpet yarn twisting machine, comprising a machine frame, a creel unit (1), an electric spindle unit (5), an overfeeding unit (4) and a reeling unit (3), in the electric spindle unit (5), a hollow spindle rod (502) is fixedly connected with a motor (501), the motor (501) drives the hollow spindle rod (502) to rotate, a twisting disc (506) and a yarn storage disc (505) are fixedly connected with the hollow spindle rod (502) and rotate along with the hollow spindle rod (502), the yarn storage disc (505) is provided with yarn outlets (504), which communicate with inner yarn channels of the hollow spindle rod (502), spindle tanks for accommodating inner yarn packages (15) are connected with the hollow spindle rod (502) through spindle rod bearings (509), and the spindle tanks are immobile.

A method for operating a spindle (2) of a two-for-one twisting or cabling machine, in which an outer yarn (5) is drawn off a first feed package (7) and the spindle (2) rotates in a yarn balloon (B), wherein the spindle (2) comprises a device (6) for influencing the balloon yarn tension of an outer yarn (5), which is connected to a control circuit (18), and has a spindle pot (19) for receiving a second feed package (15), a yarn deflection device (20), a balancing system (9) for forming a twisting or cabling point as well as a spooling and winding device (12). The drive of the yarn balloon (B) is performed via a fixed throw-off point (21) on the yarn deflection device (20).

A device for determining the diameter of a yarn balloon (B) formed by a running yarn at a workstation (1) of a textile machine wherein the workstation (1) is provided with a mechanical, contact scanning sensor (22), which is designed and arranged so that during the operation of the workstation (1) it is positioned by a yarn forming the thread balloon (B) in an operating position dependent on the diameter of a thread balloon (B), and a sensor device (24) is provided which detects the operating position (BS) of the scanning sensor (22).

A method for starting a spindle of a cabling or two-for-one twisting machine, wherein a yarn reserve is formed on a take-up package, the machine has a workstation having a spindle pot for holding a first feed package and having a spindle rotor with a lateral outlet below the spindle pot, an outer yarn from one feed package is wound around an inner yarn from another feed package and the outer yarn is guided through the spindle shaft and its lateral outlet in a balloon orbiting the spindle pot to a yarn-guiding device above the spindle which merges the two yarn supplies, and a winding device in which the produced twist is wound onto the take-up package. A ratio of the take-up speed of the twist to the rotation speed of the spindle rotor is increased in comparison with the production data is used during creation of the yarn reserve.

An outer-yarn brake (14) for a cording or cabling machine with at least one workstation comprising a bobbin rack (2) for holding at least one feed bobbin (4), a spindle (12) for the rotation of a yarn (6) withdrawn from the feed bobbin (4) around a bobbin pot associated with the spindle (12), and a yarn-guide channel (10) for guiding the yarn (6) received via a free end-portion (8) of the yarn-guide channel (10) to the spindle (12). The outer-yarn brake (14) can be arranged in the yarn running direction of the withdrawn yarn (6) between the feed bobbin (4) and the yarn-guide channel (10) to guide through the withdrawn yarn (6) and comprises a clamping portion for defined braking of the running yarn (6). The outer-yarn brake (14) can be coupled to the free end-portion (8) in order to form a yarn input for the yarn-guide channel (10).

A workstation (1) of a two-for-one twisting or cabling machine which comprises a rotatably mounted spindle (2) and a balloon-yarn-guide-eye (9) height-adjustable by means of a drive (18, 29) coupled to a control device (20) which controls the drive (18, 29) in such a manner that it displaces the balloon-yarn-guide-eye (9) between operating positions (AP.sub.1, AP.sub.2) dependent upon production parameters and a resting position (RS) advantageous in the case of production interruptions and transient operating phases associated with the latter. A device (21, 23, 24, 25) is present for detecting a measured value (i), which is made available to the control device (20) and which causes the control of the drive (18, 29) to change the position of the balloon-yarn-guide-eye (9).

A method for operating a spindle (2) of a two-for-one twisting or cabling machine which comprises an adjustable balloon-yarn-guide-eye (9), wherein for the operation of the spindle (2) under production conditions, the balloon-yarn-guide-eye (9) is adjusted, on the basis of a measured value (i) correlating with the energy consumption of the spindle drive (3), to a first operating position (AP.sub.1), in which a position-dependent minimum of the energy consumption of the spindle drive (3) is reached.

Workstation of a two-for-one twisting or cabling machine for production of carpet yarn, including winding device having package cradle with two frame arms for rotatable mounting of an empty tube or twisting package, package drive roller for frictionally driving twisting package, yarn traversing device for traversing transfer of a yarn to the twisting package, advance roller for regulating a yarn tension, and cover in area of the advance roller with an opening for yarn guided through the yarn traversing device to the twisting package. Package cradle has at least one movable, partially rotatable frame arm and designed so an empty tube with length of at least 315 mm is insertable, that the package drive roller has length of at least 286 mm, that yarn traversing device has traversing stroke of at least 11 inches, and that opening in cover corresponds with the yarn path arising due to the traversing stroke.