let off motion a measuring wheel pulse generator 10 with encoder 10a passes on data to a synchronized control system 11 the setting parameters input in the figure are stored in the memory of a microprocessor control system 12 of the weaving machine 13 the system 11 receives signals from the pulse generator 13a of the machine from the encoder 10a from the microprocessor control system 12 from the motor 6 and from the regulator 7 and sends signals to the microprocessor control system 12 and to the regulator 7 said regulator 7 receives also a feedback signal from the motor 6 the drive of the pile warp beam 5 is controlled by the same regulator 7 as that of the already known pile warp let off motion but additional accessories are provided servomotor 6 with resolver 6c and holding brake 6d fig4 the drive of the ground warp beam 50 is also controlled by servo drive 60b and servomotor 60 with resolver 60c and handbrake 60d but the tension in the ground warp is held constant by means of a measuring system consisting of a cam and a linear probe on compensation device 61 fig5 gears 60a reduction are placed between the motor 60 and the beam 50 advantageously a protective system on the ground warp tension is also provided user interface 12 on the weaving machine in which the desired pile feed can be entered shotwise as a function of the weave to be woven on each shot a regulating system 70 on the pile warp beam let off motion this regulating system is preferably a multi axis control system provided for one or more pile warp beams and preferably for one or more ground warp beams the regulation of the ground warp beams max 2.