Iropa Ag

Vandewiele Sweden Ab

Picanol

Birger Johansson

Henrik Svensson

Pär Josefsson

William Shafiei

Bjrön Halvarsson

Described are, among other things, methods and devices for providing a learning procedure in a yarn feeding arrangement (). The learning procedure aims at providing control data to the controller () about system components and behavior of system components of the yarn feeding arrangement beforehand, such that the controller has knowledge of the system components before the weaving machine () is started to operate at full operational speed.

Yarn feeding device with learning procedure

A method for controlling the motion of a yarn stopper magnet in a measuring feeder for textile machines, preferably for weaving machines of the air-or waterjet-type. The stopper magnet has an armature connected to a yarn stopper element, which armature co-acts with at least one electromagnetic coil in order to achieve the desired motion of the stopper magnet. During an initial part of the motion of the stopper element, the electromagnetic coil is supplied with a voltage with an amplitude considerably exceeding the average level of the voltage during the remaining part of the motion, in order to achieve an optimally fast motion with a low input energy amount and thereby a low heat development, as well as low kinetic energy (speed) of the stopper element at the end of its motion.

Stopper magnet for a measuring yarn feeder

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Ulricehamn, Sweden

Birger Johansson