A thread guide wear testing machine wears a test piece by causing a thread to slide while the thread contacts the test piece. The thread guide wear testing machine includes a winding reel winding the thread thereon fed from thread feeder. A winding drum guides the thread fed from the thread feeder to the winding reel. The winding drum has an outer peripheral surface contacting an outer peripheral surface of the winding reel. Specimen holder is on a path of the thread fed from the thread feeder and moves while being wound on the winding reel. The specimen holder holds the test piece in contact with the thread under a predetermined load. Tension adjuster adjusts tension on the thread when the test piece is in contact. Contact retainer retains a state of contact between the winding reel and the winding drum by pressing the winding reel toward the winding drum.

The invention relates to a winding device (16) for winding a yarn (20) onto a package tube (22) in order to form a yarn winding package (24). The winding device comprises a spindle (34) for holding and rotationally driving the package tube (22) about its longitudinal axis (30) and a support roller (40) that abuts against the peripheral surface of the yarn winding package (24) during winding of the yarn (20). The spindle (34) with the yarn winding package (24) can be swiveled relative to the support roller (40) by means of at least one pivotably mounted swivel arm (46). The winding device has a contact-force control device (54) with an actuator (56) for the swivel arm (46), with a control device (58) for controlling the actuator (56), and with a bending beam load cell (60) associated with the swivel arm (46). This is used to determine a respective actual value of the contact force F.sub.A of the yarn winding package (24) against the support roller (40) with which the contact force F.sub.A can be regulated to a predetermined target value by means of the control device (58) through appropriate controlling of the actuator (58). The invention further relates to a yarn processing machine (10) with an aforementioned winding device (16).

The invention relates to a winding device (16) for winding a yarn (20) onto a package tube (22) in order to form a yarn winding package (24). The winding device comprises a spindle (34) for holding and rotationally driving the package tube (22) about its longitudinal axis (30) and a support roller (40) that abuts against the peripheral surface of the yarn winding package (24) during winding of the yarn (20). The spindle (34) with the yarn winding package (24) can be swiveled relative to the support roller (40) by means of at least one pivotably mounted swivel arm (46). The winding device has a contact-force control device (54) with an actuator (56) for the swivel arm (46), with a control device (58) for controlling the actuator (56), and with a bending beam load cell (60) associated with the swivel arm (46). This is used to determine a respective actual value of the contact force F.sub.A of the yarn winding package (24) against the support roller (40) with which the contact force F.sub.A can be regulated to a predetermined target value by means of the control device (58) through appropriate controlling of the actuator (58). The invention further relates to a yarn processing machine (10) with an aforementioned winding device (16).

The present invention relates to a method and a device for swiveling a bobbin (2) in a winding device during an interruption of a winding operation. The bobbin (2) rests on a backing roller (3) and is formed on a bobbin tube (5) onto which a thread (4) is wound. The bobbin tube (5) is rotatably held between two retaining arms (6, 7) via a holder (8, 9) in each case. The two retaining arms (6, 7) are mounted on a shared swivel arm (10) having a swivel axis (11). A force effect that acts on at least one retaining arm (6) due to contact of the bobbin (2) with the backing roller (3) or the intrinsic weight of the bobbin (2) is measured by a force measurement unit (12). A force (G, H) is introduced into this retaining arm (6) by a manual transmission of force, wherein a force direction of the manually introduced force (G, H) is determined by evaluating the force measurement, and by means of a drive (13) the swivel arm (10) is swiveled corresponding to the force direction.

The present invention relates to a method and a device for swiveling a bobbin (2) in a winding device during an interruption of a winding operation. The bobbin (2) rests on a backing roller (3) and is formed on a bobbin tube (5) onto which a thread (4) is wound. The bobbin tube (5) is rotatably held between two retaining arms (6, 7) via a holder (8, 9) in each case. The two retaining arms (6, 7) are mounted on a shared swivel arm (10) having a swivel axis (11). A force effect that acts on at least one retaining arm (6) due to contact of the bobbin (2) with the backing roller (3) or the intrinsic weight of the bobbin (2) is measured by a force measurement unit (12). A force (G, H) is introduced into this retaining arm (6) by a manual transmission of force, wherein a force direction of the manually introduced force (G, H) is determined by evaluating the force measurement, and by means of a drive (13) the swivel arm (10) is swiveled corresponding to the force direction.

In a spinning machine or winder comprising at least one pneumatic device (7) including a supply line (8) for a first pressure (P.sub.1), a regulating line (9) for an operating pressure (P.sub.2), a valve system (10), a manometer (13), and a data processing unit (14), the regulating line (9) is connected to the manometer (13) in such a way that the operating pressure (P.sub.2) is measured by the manometer (13). The valve system (10) comprises a first valve (11), which is connected to the supply line (8), or a first path (17) of a directional control valve (16) for feeding a pressure medium into the regulating line (9), and a second valve (12), which is connected to a surrounding atmosphere, or a second path (18) of a directional control valve (16) for draining the pressure medium from the regulating line (9), wherein the data processing unit (14), which is connected to the manometer (13) and to the valve system (10), is designed for opening the first valve (11) or the first path (17) and closing the second valve (12) or the second path (18) if the operating pressure (P.sub.2) is less than a first set value, and opening the second valve (12) or the second path (18) and closing the first valve (11) or the first path (17) if the operating pressure (P.sub.2) is greater than the first set value or a second set value, wherein the first pressure (P.sub.1) is greater than the operating pressure (P.sub.2).

The invention relates to an automatic turret type yarn winding device. The automatic bobbin changeover process involves winding of yarn on a bobbin, followed by rotation of the turret to bring an empty bobbin into the winding position. Pressure rollers are provided to ensure consistent and accurate winding. The accurate relative positioning of the bobbins and pressure rollers is important. Wear and tear and particulate dust may cause malfunctioning of winder systems which may affect accuracy of turret rotations and relative positioning of the bobbins and pressure rollers, especially when the turret rotation during bobbin changeover stage is done in a single rotation. The invention provides a device and a method to position spindle precisely in turret type automatic winder, especially to identify correct stationing position of turret spindle after reverse movement post doffing. It involves, during the bobbin changeover process, the step of rotating the turret in at least two discrete rotational movements carried out at controlled speeds, whereby the empty bobbin assumes its accurate winding position.

The invention relates to an automatic turret type yarn winding device. The automatic bobbin changeover process involves winding of yarn on a bobbin, followed by rotation of the turret to bring an empty bobbin into the winding position. Pressure rollers are provided to ensure consistent and accurate winding. The accurate relative positioning of the bobbins and pressure rollers is important. Wear and tear and particulate dust may cause malfunctioning of winder systems which may affect accuracy of turret rotations and relative positioning of the bobbins and pressure rollers, especially when the turret rotation during bobbin changeover stage is done in a single rotation. The invention provides a device and a method to position spindle precisely in turret type automatic winder, especially to identify correct stationing position of turret spindle after reverse movement post doffing. It involves, during the bobbin changeover process, the step of rotating the turret in at least two discrete rotational movements carried out at controlled speeds, whereby the empty bobbin assumes its accurate winding position.

The frame brake assembly includes a sleeve, a piston, a brake, and a retracting device. The piston translates within the sleeve between an upper first position and a lower second position. A brake is coupled to a lower portion of the piston beneath the sleeve. As the piston moves between positions, the brake moves in a corresponding manner. In the second position, the brake is lowered into contact with the ground. The retracting device is used to automatically return the piston and brake to the first position. When installed on the coiling machine, the frame brake assembly is coupled to the frame of the coiling machine and is in selective engagement with a pair of spool arms. Rotation of the spool arms induces translation from the first position to the second position in the frame brake assembly.

The frame brake assembly includes a sleeve, a piston, a brake, and a retracting device. The piston translates within the sleeve between an upper first position and a lower second position. A brake is coupled to a lower portion of the piston beneath the sleeve. As the piston moves between positions, the brake moves in a corresponding manner. In the second position, the brake is lowered into contact with the ground. The retracting device is used to automatically return the piston and brake to the first position. When installed on the coiling machine, the frame brake assembly is coupled to the frame of the coiling machine and is in selective engagement with a pair of spool arms. Rotation of the spool arms induces translation from the first position to the second position in the frame brake assembly.