21 is first rotated back by means of the auxiliary drive motor means 2 in such a way that the auxiliary shaft 4 is brought to a position corresponding to the desired set value 14 supplied to the control unit 6 this is automatically determined by control unit 6 and by means of the detectors 7 and 8 the control unit 6 then causes the switching off of the auxiliary drive motor means 2 the switching on or locking of the coupling element 13 and finally the switching on of the main drive motor means 1 to resume weaving it is to be noted that the auxiliary drive motor means 2 comprises a drive means which is also designed to achieve slow running of the weaving loom it is switched on coupling 13 locked it is also clear that in the case of a pick finding device 5 as illustrated in fig2 the coupling element 13 rotates at a higher speed compared with the rotational speed of the main shaft 3 and the auxiliary shaft 4 this provides an advantage in that the main shaft 3 and the auxiliary shaft 4 can be coupled to each other at many possible relative angular positions which is particularly suitable for achieving an.