The assembly has a strut (3) integrated to a small tractor, and a heddle marker (6) including two cutting disks defining a cut axle (10) of the marker. A deflection (4) is mounted between the strut and the marker that is mounted on the deflection in a pivot point (7), where the distance between an axis and the point is fixed. Maintaining units maintains the cut axle to follow a translation displacement along a path comprising an arc of circle, whose center is the axle and radius the distance of the axis at the pivot point, by remaining parallel to the strut during its displacement.
