specific sets of rpm values for the starting phase and sets of rpm values for the stopping phase and controlling the rpm of the main carding cylinder in the starting and stopping phases by the control device in accordance with respective rpm values stored in the memory application_number US 33382689 A description turning to fig1 there is schematically shown in side elevation a carding machine which may be for example an exactacard dk 715 model manufactured by trutzschler gmbh amp co kg the card has a feed roller 1 a licker in 2 a main carding cylinder 3 a doffer 4 a stripper roller 5 crushing rollers 6 7 a web guiding element 8 a sliver trumpet 9 calender rollers 10 11 and travelling flats 12 the arrows drawn into the roller components 1 7 10 and 11 indicate the directions of rotation the carding cylinder 3 is connected with an electric drive motor constituted by an rpm controlled electromotor 13 which is operatively connected with a control apparatus 14 for setting predetermined rpm 39 s the control apparatus 14 comprises a microprocessor 15 which constitutes a central processing unit and which is coupled with memories 16 and 17 and with an interface 18 the control components 15 18 form together a.