longer be aligned with the longitudinal axis of the bolt 32 thus a pivoting movement around the shaft 13 is imparted to the rocking lever during the rotation of the cam 19 and this pivoting movement is transmitted as a pushing movement to the feed dog 40 transporting the fabric being sewn via the arm 35 around the supporting arm 38 the feed dog 40 receives its usual lifting movement via the lobe 18 of the lifting cam 17 which said cam cooperates with the web 41 of the supporting am 38 when the sewing machine is turned on a main menu is displayed by the control unit of the microprocessor 42 on the display unit 56 as is shown in fig1 controlled by the microprocessor 42 the keys 58a with the symbols 1 through 6 are activated while the other keys 58a are blocked the microprocessor 42 turns on a simple straight stitch seam with a stitch length of 2 5 min this corresponds to the actuation of the key 58a bearing the symbol 34 1 34 if the starter of the sewing machine is now actuated without the operator having actuated a key 58a this straight stitch described will be prepared by the sewing machine the operator normally selects a basic pattern by actuating one of the keys 58a prior to starting up the machine this is.