5 and a fabric sheet 6 through which warp threads 7 are pulled a woven product 8 is constantly pulled by three fabric beams 9a 9b 9c through a not shown fabric beam regulator in each working cycle of the power loom by an exactly identical piece a not shown shaft dobby mechanism moves the fabric shafts 10 and 10b with heddles 11a and 11b the warp threads 7 run through the eyes and thereby form a shed 12 in which the weft threads are introduced by a not shown shuttle at the rear side of the frame wall 1 a supporting element 13 is provided for guiding the warp threads 7 coming from the warp beam 15 the warp beam 15 is supported in bearings 19 and is driven by a not shown motor a drive for the crankshaft 2 is shown schematically inside the broken line for the frame wall 1 a spur wheel 14 is fixedly connected with the crankshaft 2 and engages with a pinion 16 the pinion 16 is turn is fixedly connected with a worm wheel 18 which engages a worm shaft 20 the axle of the worm shaft 20 is connected with the axle of the servo motor 22 by a coupling 21 by means of the coupling 21 the driving moment can.