Shedding machine for a loom and adjusting method thereof

A shedding machine for operating a heald frame of a loom according to a reciprocating stroke along a frame axis, the shedding machine comprising:

• a rotary electric actuator;
• a controller adapted to control the rotary electric actuator
• an eccentric system, which comprises:
• a base by means of which the eccentric system is driven in rotation, by the rotary electric actuator, about a main axis perpendicular to the frame axis, and
• a connecting piece defining an eccentric axis, which is parallel to the main axis;
• a lever, which is pivoted in an oscillating way about a lever axis to actuate said heald frame, the lever axis and the main axis being parallel;
• a transmission rod, which comprises:
• a first articulation end, by means of which the transmission rod is coupled to the connecting piece such that the eccentric system and the transmission rod are pivotable relative to each other about the eccentric axis, the eccentric axis and the main axis being spaced apart by an eccentric center distance, and
• a second articulation end, by means of which the transmission rod is coupled to the lever, so that the lever and the transmission rod are pivotable relative to each other about a transmission rod axis, which is parallel to the main axis, the transmission rod axis and the eccentric axis being spaced apart by a transmission rod center distance;
• an adjustment system, which comprises locking means and which allows:
• at least one adjustment configuration, among:
• an amplitude adjustment configuration, in which the locking means allow a movement of the connecting piece relative to the base such that the eccentric center distance is adjustable, and
• a height adjustment configuration, wherein the locking means allow movement of the second articulation end relative to the first articulation end such that the transmission rod center distance is adjustable;
• and
• a locked configuration, in which the eccentric center distance and the transmission rod center distance are fixed, in that the locking means are configured so that the connecting piece is fixedly secured to the base and the first articulation end is fixedly secured to the second articulation end;
• and
• a locking system, which allows for a locked configuration, where the locking system locks the orientation of the lever, when the lever is in a reference orientation, and a release configuration, where the locking system allows pivoting of the lever.