Nuova Roj Electrotex S.r.l.

Iropa Ag

Nouva Roj Electrotex S.r.l.

Marco Covelli

Giorgio Gabogna

Enzo Dandolo

Giovanni Silmo Rubin

A weft yarn deflection brake including a braking elementwhich can be adjusted in timed fashion and by its variable braking force, a drive motorfor said braking element and a control device CU connected with said drive motoris equipped by a position detection means E associated to said braking elementSaid position detecting means E is connected to an adjustment meansfor functional parameters of the deflection brake. During operation functional parameters as e.g. the braking force and the time of the activation of the deflection brake are varied adaptively in order to assure a performance of the deflection brake which is deemed to be optimal for the insertion system. At selected points in time known target positions of the braking element are set and compared with the actual positions. In case that deviations are detected a respective functional parameter is varied.

Weft yarn deflection brake and method for controlling the weft insertion into weaving machine

A yarn processing system includes a weft yarn feeding device with a control unit and a power loom which consumes weft yarn. In operation, a run-signal is generated by the power loom that initializes the start-up of the weaving operation. A start-signal that is derived from the run-signal is transmitted to the feeding device. The start-signal is generated externally of the feeding device. The drive motor of the feeding device is driven at a predetermined speed, after receiving the external start-signal in order to prevent an undesired reduction of the size of a yarn store by the initial consumption demand of the start-up of the weaving operation of the power loom. A signal transmitting connection is provided in the yarn processing system between the power loom and a control unit of the feeding device for transmitting the start-signal. On start-up of the power loom, the drive motor of the feeding device is operated at a predetermined speed by the control device independent from the size of the yarn store in the feeding device.

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Occhieppo Inferiore, Italy

Marco Covelli