A guard insert having a body and a guide. The body can include a top surface, an opposed bottom surface, and a plurality of side edges extending between the top and bottom surfaces and including a front side edge. The body can define a slot and a plurality of fastener-receiving openings. The slot can extend inwardly from the front side edge. The plurality of fastener-receiving openings can extend through the top and bottom surfaces, with each opening of the plurality of fastener-receiving openings being configured to receive a fastener. The guide can be securely received within the slot of the body. The guide can have an outer peripheral wall and an inner peripheral wall. The outer peripheral wall can have a shape complementary to the slot, and at least a portion of the inner peripheral wall can define a channel configured for receiving yarn.

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 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.

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.