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AssigneePicanol N.V.
InventorsDirk Sampers, Chris Noppe, Emmanuel Delboo, Sven Cafmeyer, Marc Adriaen
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A drive mechanism for driving a heald frame of a weaving machine, the drive mechanism having a sensor device, wherein the sensor device has at least three members having both a target set with one or more targets and a detector set with one or more detectors, wherein one of the detector set and the target set is arranged at the swivel lever and the other one is arranged stationary on the weaving machine, targets of the target set and/or detectors of the detector set have different characteristics for generating a first signal when approaching the measuring position from the upper position or when departing from the measuring position towards the upper position and for generating a second signal when approaching the measuring position from the lower position or when departing from the measuring position towards the lower position, and the second signal differs from the first signal.
A drive mechanism for driving a heald frame of a weaving machine, the drive mechanism comprising a sensor device, a crank rotating about a crank axis, a coupling rod, and a swivel lever having a first arm and a second arm, wherein the swivel lever is swivelable to-and-fro about a swivel axis between an upper position and a lower position, and wherein the coupling rod is linked to the crank by a first hinged joint, which first hinged joint is eccentric to the crank axis, and wherein the coupling rod is linked to the first arm of the swivel lever by a second hinged joint, wherein the sensor device is arranged for detecting a state at which the swivel lever reaches a measuring position, which measuring position is located between the upper position and the lower position, wherein the sensor device comprises at least three members comprising both a target set with one or more targets and a detector set with one or more detectors, wherein one of the detector set and the target set is arranged at the swivel lever and the other one is arranged stationary on the weaving machine, wherein targets of the target set and/or detectors of the detector set have different characteristics for generating a first signal when approaching the measuring position from the upper position or when departing from the measuring position towards the upper position and for generating a second signal when approaching the measuring position from the lower position or when departing from the measuring position towards the lower position, wherein the second signal differs from the first signal.
A method for detecting the presence of a swivel lever of a drive mechanism for driving a heald frame of a weaving machine in a measuring position, wherein the drive mechanism comprises a sensor device, a crank rotating about a crank axis, a coupling rod, and a swivel lever having a first arm and a second arm, wherein the swivel lever is swivelable to-and-fro about a swivel axis between an upper position and a lower position, and wherein the coupling rod is linked to the crank by a first hinged joint, which first hinged joint is eccentric to the crank axis, and wherein the coupling rod is linked to the first arm of the swivel lever by a second hinged joint, wherein the measuring position is located between the upper position and the lower position, wherein a first signal is generated by the sensor device when approaching the measuring position from the upper position or when departing from the measuring position towards the upper position and a second signal is generated by the sensor device when approaching the measuring position from the lower position or when departing from the measuring position towards the lower position, wherein the second signal differs from the first signal.
Dependencies are inferred from the claim text.