be matched to the possible machine output and thus the relationship of carding technology to card structure can be optimized a further advantage is that for other functions e g the drive and or the carding technology a certain regulating behavior can be realized via desired predeterminable characteristics as a result the information required for carding work such as roller and doffer speeds sliver thickness speed ratios and the like are centrally compiled evaluated and processed in an optimum manner fig5 is a programming flow diagram illustrating the sequence of operations carried out by the microprocessor 1 according to a basic embodiment of the invention as is the general practice in this art the operating sequence is performed cyclically at a rate selected to assure that adjustments will be made sufficiently rapidly since variations in a carding process occur very slowly compared to conventionally microprocessor cycle times this requirement does not present any difficulty in the present case particularly given the relatively small number of steps involved in a complete operating cycle in the operating sequence depicted in fig5 the first calculation block indicates that the desired and actual values for the speeds of the doffer 14 and the feed roller 11 are determined based on values provided by the data memory 2 and the tachogenerators 21 and 26 the desired and actual values for the.