Shedding assembly for a loom and its adjustment method

A shedding assembly comprising at least one shedding machine, for operating a heald frame of a loom according to a reciprocating translational stroke along a frame axis, said at least one shedding machine comprising:

• a rotary electric actuator;
• an actuator controller able to control the rotary electric actuator;
• an eccentric system, which comprises:
• a base by means of which the eccentric system is rotated by the rotary electric actuator about a main axis perpendicular to the frame axis, and
• a linkage defining an eccentric axis, the eccentric axis being parallel to the main axis;
• a first lever, which is pivotable about a first lever axis to actuate said heald frame, the first lever axis and the main axis being parallel;
• a second lever, which is pivotable about a second lever axis to actuate said heald frame, the second lever axis and the main axis being parallel;
• a first connecting rod, which comprises:
• a first articulation end, by means of which the first connecting rod is coupled to the linkage, so that the eccentric system and the first connecting rod are pivotable relative to each other about the eccentric axis, the eccentric axis and the main axis being distant by an eccentric center distance, and
• a second articulation end, by means of which the first connecting rod is coupled to the first lever, so that the first lever and the first connecting rod are pivotable relative to each other about a connecting rod axis, which is parallel to the main axis, the connecting rod axis and the eccentric axis being distant by a connecting rod center distance;
• and
• a second connecting rod, which is coupled to the first lever and the second lever, making the second lever pivot in conjunction with the pivoting of the first lever;
• an adjustment system, which comprises locking means and which allows:
• at least one adjustment configuration, among:
• an amplitude adjustment configuration, wherein the locking means allow a movement of the linkage relative to the base so that the eccentric center distance is adjustable, and
• a height adjustment configuration, wherein the locking means allows movement of the second articulation end relative to the first articulation end so that the connecting rod center distance is adjustable;
• and
• a locked configuration, wherein the eccentric center distance and the connecting rod center distance are fixed, wherein that the locking means is configured so that the linkage is integral with the base and the first articulation end is integral with the second articulation end;
• and
• a follower member, which equips the second connecting rod;
• and wherein the shedding assembly comprises a flap, which is configured to move the second connecting rod of said at least one shedding machine by driving the follower member, in order to adjust the eccentric center distance, in the case where the adjustment system is in an amplitude adjustment configuration, and to adjust the connecting rod center distance, in the case where the adjustment system is in a height adjustment configuration.