Abstract: A method and device for automatically measuring the yarn length absorbed by a rectilinear machine adapted to produce an article and including a carriage movable to-and-fro over a needle bed between two ends of a working path, needles moving towards the carriage to cooperate with the yarn (F) and form an article, the yarn unwinding from a feeder with elements for measuring the yarn quantity fed at constant tension towards the needle bed. The feeder measures and constantly monitors the yarn feed velocity, this monitoring enables the fed and knitted yarn quantity to be obtained in real time and each measurement to be associated with the respective carriage travel stroke, this information enabling precise regulation of the knitting cams.

Abstract: Device and method for constant tension feeding, threads or yarns fed to textile or winding machine or metallic wire to similar machine, in discontinuously with phase sequences. The thread motion has at least first and second feeding or absorption states following each other in time. A controller, connected to a tension detector and thread accumulator, intervenes on the accumulator based upon tension value from the detector. A compensator, between the accumulator and tension detector, cooperates with thread to compensate variation of feeding or absorption state of the thread upon passage between each first and second feeding or absorption state. The controller intervenes to modify the accumulator's action on thread and maintain tension value detected by the detector at set value. Interaction between thread and compensator keeping constant tension value during the changing phase of the feeding state. The compensator freely moveable under action of thread relative to a resting position.

Abstract: A method and device for automatically measuring the yarn length absorbed by a rectilinear machine adapted to produce an article and comprising a carriage (3) movable to-and-fro over a needle bed (1) between two ends of a working path, needles (2) moving towards said carriage (3) to cooperate with the yarn (F) and form an article, said yarn unwinding from a feeder (5) comprising means for measuring the yarn quantity fed at constant tension towards said needle bed; the feeder (5) measures and constantly monitors the yarn feed velocity, this monitoring enabling the fed and knitted yarn quantity to be obtained in real time and each measurement to be associated with the respective carriage travel stroke, this information enabling precise regulation of the knitting cams.

Abstract: A system for controlling the feed of a yarn to a textile machine or a metal wire to a coil winder. The yarn or wire unwinds from its spool and cooperates with a rotary member associated with its own rotation actuator before being directed to the machine. The yarn or wire has a characteristic value of tension and/or speed and/or quantity during this feed, and the actuator has a stator and a rotor acting on an exit drive shaft, which has its own piloting arrangement. The rotary member about which the yarn or wire winds is keyed onto the exit drive shaft. This control system measures the angular position of the drive shaft and compares an instantaneous parameter of that angular position to a prefixed characteristic value of the yarn or wire Command signals are then fed to the actuator's piloting arrangement to conform the instantaneous parameter with this prefixed value.

Abstract: A modular element of creel including a structure having at least one support suitable to support a reel or yarn spool; the structure is in the form of a solid polygon and includes a feeder device suitable to allow the feeding of the thread developed by such spool with at least one characteristic, selected from the characteristics of tension and speed, maintained constant and equal to a preset fixed value or function of the operational phase of the machine. The structure is able to be modularly coupled to other similar structures to allow the feeding of more yarn to a textile machine. Every yarn fed by every modular element having its own selected characteristic defined by the feeder device associated with such modular element.

Abstract: A method for feeding a plurality of yarns with constant values of fed length to a textile machine, each yarn unwinding from a spool and cooperating with a feed device, arranged to maintain the tension of the yarn at a predefined constant value before being directed to the textile machine. At least one control unit controls the feed to this machine such that an absorbed yarn length value to be maintained for each yarn fed to the textile machine is set or self-learnt. After measuring an actual value of the yarn length absorbed by this machine and comparing it with this predefined value, the control unit acts upon one or more feed devices and modifies the tension value of the corresponding yarn in order to make these absorbed yarn length values equal to the predefined value. A method for implementing this method is also claimed.

Abstract: Sensor for controlling thread or yarn feed to a textile machine wherein a body or casing suitable for being arranged on a support of the machine or positioned near to it and having detection methods suitable for detecting at least one feed characteristic of the yarn to the machine. In the casing or body of the sensor, resources are provided for control of the detection and suitable for modifying the modes of control according to a plurality of control algorithms stored in memory associated with the casing; associated with the latter, selector methods are also provided suitable for allowing a user to choose one of the algorithms, thus selecting the desired operating mode of the sensor during its yarn feed control. The method for selecting desired sensor operating mode is also disclosed.

Abstract: A method for feeding a yarn (F) under constant tension to a yarn processing point of a textile machine (T) distant from spool (2) or equivalent support from which the yarn (F) unwinds, the tension of said yarn (F) being controlled in proximity to the spool (2) such that this parameter is monitored and controlled immediately after the yarn (F) has been unwound from the spool (2), the yarn (F) fed to the textile machine (T) cooperating, before reaching said processing point on the machine (T), with a series of thread guide elements (8) which modify the tension of the regulated tension. A second tension control is effected in proximity to the textile machine (T), said control being used for further adjustment of the tension of the yarn (F) in proximity to the spool (2) to hence regulate the tension of the yarn (F) entering the machine (T) to a predetermined constant value.

Abstract: Device and method for constant tension feeding, threads or yarns fed to textile or winding machine or metallic wire to similar machine, in discontinuously with phase sequences. The thread motion has at least first and second feeding or absorption states following each other in time. A controller, connected to a tension detector and thread accumulator, intervenes on the accumulator based upon tension value from the detector. A compensator, between the accumulator and tension detector, cooperates with thread to compensate variation of feeding or absorption state of the thread upon passage between each first and second feeding or absorption state. The controller intervenes to modify the accumulator's action on thread and maintain tension value detected by the detector at set value. Interaction between thread and compensator keeping constant tension value during the changing phase of the feeding state. The compensator freely moveable under action of thread relative to a resting position.

Abstract: A system (1) for controlling the feed of a yarn to a textile machine or a metal wire to a coil winder or a similar machine, the yarn or wire unwinding from its own spool and cooperating with a rotary member associated with its own rotation actuator (2) before being directed to the machine, the yarn or wire having its own characteristic value of tension and/or speed and/or quantity during this feed, the rotation actuator (2) comprising a stator and a rotor acting on an exit drive shaft (13) and being piloted by its own piloting means, the rotary member about which the yarn or wire winds being keyed onto the exit drive shaft (13), the control system comprising: means (4) for continuously measuring an angular position of the drive shaft of the actuator (2), comparison and command means (5, 8) connected downstream of the measurement means (4), to compare an instantaneous parameter correlated to the measured angular position of the drive shaft (13), with a corresponding predetermined parameter relative to a prefix

Abstract: A method for feeding a plurality of yarns with constant values of fed length to a textile machine (5), each yarn (2) unwinding from a spool (1) and cooperating with a usual feed device (4), arranged to maintain the tension of the yarn (2) at a predefined constant value before being directed to the textile machine (5), there being provided at least one control unit (6) for controlling the feed to said machine (5); an absorbed yarn length value to be maintained for each yarn (2) fed to the textile machine (5) is set or self-learnt, an actual value of the yarn length effectively absorbed by said machine (5) is measured, and this predefined value is compared with the actual value, to act upon one or more feed devices (4) and modify the tension value of the corresponding yarn (2) whenever this comparison indicates a deformity between said predefined values and the actual measured values, said tension modification making these absorbed yarn length values equal to the predefined value.

Abstract: A method for feeding a yarn (F) under constant tension to a yarn processing point of a textile machine (T) distant from spool (2) or equivalent support from which the yarn (F) unwinds, the tension of said yarn (F) being controlled in proximity to the spool (2) such that this parameter is monitored and controlled immediately after the yarn (F) has been unwound from the spool (2), the yarn (F) fed to the textile machine (T) cooperating, before reaching said processing point on the machine (T), with a series of thread guide elements (8) which modify the tension of the regulated tension. A second tension control is effected in proximity to the textile machine (T), said control being used for further adjustment of the tension of the yarn (F) in proximity to the spool (2) to hence regulate the tension of the yarn (F) entering the machine (T) to a predetermined constant value.

Abstract: A device (1) for controlling the feed of yarn (11) fed to a textile machine (10) such as a knitting machine, hosiery machine or a bobbin winder, comprises means (18) for ascertaining the yarn tension and means (3, 12) for measuring its feed velocity to the textile machine (10), said ascertainment and measurement being effected by evaluation and control means (20) which enable said tension and velocity values to be established with precision. A method implemented using the aforesaid device enables the evaluation and control means to control and regulate the operation of the textile machine (10) and for example the stitch length in a knitting or hosiery machine.

Abstract: A device for monitoring the feed of a plurality of yarns (2) to a textile machine (1) comprises a number of sensor means (4) equal to the number of yarns (2) and each cooperating with a corresponding yarn (2) of which they sense the state of feed, and being connected to a control unit (5) which, on the basis of the signals generated by the sensors and of a reference signal (V.sub.A) which is a function of the operating position of the machine (1), enables this latter to be activated or not. The sensors (4) are connected to the unit via a number of connection members less than the number of sensors, each sensor being provided with its own identification code. The device is controlled by the control unit (5) which sequentially interrogates the various sensors (4) by feeding them their own identification code, only that sensor (4) which recognizes this code then feeding to the unit the data relative to the state of the yarn (2) monitored by it.