together with toothed segment 91 which can be driven by stepper motor 93 via pinion 92 the spring loaded brake which can be activated by electromagnet 93 acts on toothed segment 92 toothed segment 92 adjusts stitch width in the well known manner by means of the linage which is not illustrated adjustment knob 27 is located on spindle 94 to which toothed segment 95 is also attached pinion 96 of stepper motor 97 engages in toothed segment 95 toothed segment 95 is provided with engagement toothing 98 into which a spring loaded engagement pin 99 engages this pin can be actuated by electromagnet 100 toothed segment 95 adjusts the needle deflection in a well known manner by means of a linkage which is not depicted both toothed segments 91 and 95 are each provided with a magnet 101 which acts on a positioning sensor 102 to adjust stitch width and needle deflection electromagnets 93 and 100 are activated to release the respective toothed segment after which the assigned stepper motors 93 or 97 first bring the segment into the zero position this status is reported by positioning sensor 102 and the stepper motor then brings the assigned toothed segment into the preselected position so that adjustment is obtained fig8 shows the adjustment mechanism required for stitch length preselection adjustment knob 29 is positioned on hollow shaft 110 while knob 29a is located on rod 111 which passes through shaft 110 the inner end of rod 111 acts together with bracket 112 of stitch position slide 113 return spring 114 acts on knob 29a hollow shaft.