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AssigneeIropa AG
InventorMarco Covelli
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The invention relates to a method for controlling a weft yarn feeding device F in a yarn processing system, comprising, in addition to the feeding device, a power look L which consumes weft yarn Y on operation, whereby a run-signal is generated by the power loom which initialises the start-up of the weaving operation. The run-signal also is transmitted to the feeding device, essentially simultaneously with a start-signal X, generated externally of the feeding device. The drive motor M of the feeding device is driven at a predetermined speed, after emission of the external start-signal X in order to prevent an undesired reduction of the size of a yarn store 13 by the initial consumption demand of the start-up of the weaving operation of the power loom. A signal transmitting connection 19, 19′ is provided in the yarn processing system between the power loom L and a control unit C1 of the feeding device F for transmitting a start-signal X which is derived from the run-signal of the power loom. On start-up of the power loom L the drive motor M of the feeding device is driven at a predetermined speed by means of the control device and independent of the size of the yarn store in the feeding device.
Method for controlling a weft yarn-feeding device in a yarn processing system (S) which at least includes a weft yarn feeding device (F) and a power loom (L) which consumes weft yarn (Y) from the start of a weaving operation, according to which method a drive motor (M) of the feeding device is switched on and switched off and is accelerated or decelerated, respectively, in dependence from control signals of a monitoring arrangement (16) for the size of a yarn store (13) by a control device (C1) associated to the feeding device, in order to maintain in the feeding device a yarn store size covering the yarn consumption, characterised by the following steps:
Yarn processing system (S) including at least one weft yarn feeding device (F) and a power loom (L), a winding drive motor (M) in the feeding device (F), a control device (C1) for the drive motor (M) and associated to the feeding device, a monitoring arrangement (16) for the size of the yarn store (13) in the feeding device and for generating control signals for the control device (C1), a power loom drive system (4, 5) including components (2, 3, 21, 22) for carrying out a weaving operation, and a signal generating switch (9) at the power loom (L) for initiating a start of the weaving operation by a run-signal, characterised in that a signal transmitting connection (19, 19′) is provided between the power loom (L) and the control device (C1) of the feeding device (F) for transmitting a start-signal (X) which is derived from the run-signal of the switch (9), and that the control device (C1) is designed such that the drive motor (M) of the feeding device (F) is driven with the occurrence of the start-signal (X) at a predetermined speed and independent from the yarn store size.
Dependencies are inferred from the claim text.