A shedding assembly with a shedding machine includes an eccentric system which defines an eccentric center distance, a first connecting rod, actuated by the eccentric system to actuate a first lever and defining a connecting rod center distance, and a second connecting rod, making the first lever pivot in conjunction with that of a second lever to actuate a heald frame. To facilitate adjustment, the shedding machine includes an adjustment system, which allows at least one adjustment configuration where one of the center-to-center distances is adjustable, as well as a follower member equipping the second connecting rod. The shedding assembly comprises a flap for moving the second connecting rod by driving the follower member for adjusting the center distance when the adjustment system is in the adjustment configuration.

A shedding machine includes an eccentric system rotatable about a main axis; a lever; and a transmission rod, coupled to the eccentric system and pivotally to the lever about the eccentric axis and connecting rod axis spaced apart by a connecting rod center distance, the main axis and the eccentric axis being spaced apart by an eccentric center distance. To facilitate the adjustment of the stroke of a heald frame operated by the machine, which includes an adjustment system, allowing an adjustment configuration where the eccentric distance or connecting rod distance is adjustable, and a locked configuration where these distances are fixed. The machine also includes a locking system, which allows lever locking and lever release configurations.

A drive mechanism for driving a heald frame of a weaving machine, the drive mechanism having a crank rotating about a crank axis, a coupling rod, and a swivel lever having a first arm and a second arm, the coupling rod is linked to the first arm of the swivel lever by a second hinged joint adjustable with respect to the first arm of the swivel lever, wherein in at intended locations of the second hinged joint with respect to the first arm of the swivel lever, the second hinged joint is situated on an arc of an imaginary circle when the swivel lever is in a central position between the upper position and the lower position, wherein the imaginary circle has a radius that is equal to the distance between the first hinged joint and the second hinged joint, and the imaginary circle has a center that coincides with the crank axis.

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 (1) of a weaving machine, the drive mechanism (2) comprising a crank (3) rotating about a crank axis (4), a coupling rod (5), and a swivel lever (6) having a first arm (8) and a second arm (9), wherein the coupling rod (5) is linked to the first arm (8) of the swivel lever (6) by a second hinged joint (17) adjustable with respect to the first arm (8) of the swivel lever (6), wherein in all intended locations of the second hinged joint (17) with respect to the first arm (8) of the swivel lever (6), the second hinged joint (17) is situated on an arc of an imaginary circle (19) when the swivel lever (6) is in a central position between the upper position and the lower position, wherein the imaginary circle (19) has a radius (R) that is equal to the distance (L) between the first hinged joint (16) and the second hinged joint (17), and the imaginary circle (19) has a center (33) that coincides with the crank axis (4). A method for adjusting a stroke of a heald frame (1) of a weaving machine.

A shedding assembly with a shedding machine includes an eccentric system which defines an eccentric center distance, a first connecting rod, actuated by the eccentric system to actuate a first lever and defining a connecting rod center distance, and a second connecting rod, making the first lever pivot in conjunction with that of a second lever to actuate a heald frame. To facilitate adjustment, the shedding machine includes an adjustment system, which allows at least one adjustment configuration where one of the center-to-center distances is adjustable, as well as a follower member equipping the second connecting rod. The shedding assembly comprises a flap for moving the second connecting rod by driving the follower member for adjusting the center distance when the adjustment system is in the adjustment configuration.

A drive mechanism for driving a heald frame (1) of a weaving machine, the drive mechanism (2) comprising a sensor device (20), wherein the sensor device (20) comprises at least three members comprising both a target set with one or more targets (21, 22) and a detector set with one or more detectors (23), wherein one of the detector set and the target set is arranged at the swivel lever (6) and the other one is arranged stationary on the weaving machine, wherein targets (21, 22) of the target set and/or detectors (23) of the detector set have different characteristics for generating a first signal (24) 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 (25) when approaching the measuring position from the lower position or when departing from the measuring position towards the lower position, wherein the second signal (25) differs from the first signal (24). A method for detecting the presence of a swivel lever (6) of a drive mechanism (2) for driving a heald frame (1) of a weaving machine in a measuring position.