Abstract: A power weaving loom works with weft thread (1) insertion and collecting bands (6, 7). Drive units are designed to drive the bands and each comprise two or more servomotors which by way of motion-transmitting members (8, 9) at each shedding cause leading parts of the bands to move towards and away from one another between the sides (4, 5) of the machine and an approximately half-width position (13) on the machine. The bands are provided with grippers (6b, 7b), by means of which the weft thread can first be drawn in from the first side of the machine to an approximately half-width position on the machine and then from this position to the second side of the machine. The servomotors are designed in a co-ordinated function to act upon the band via the motion-transmitting member with a torque which permits inward and return movements of each band during the said brief shedding times.