clearance for example 3 1000 inch may be set as a nominal value the setting of the carding clearance may also be effected by an electronic control and regulating device 33 fig6 with a nominal value memory and or inputting device the above described adjustment of the radius of a slide surface of a slide guide by circumferentially shifting the slide guide is described in further detail in u s pat no 5 918 349 when a small carding clearance is set by the mechanism shown in fig4 a 4 b and 5 a more aggressive carding results with an increased proportion in lightweight fiber waste g conversely in case the carding clearance is enlarged such a position is illustrated in fig4 b a less aggressive gentle carding results with a smaller proportion of lightweight fiber waste g as illustrated in fig3 c a relationship exists between the extent of charging the filter 25 with lightweight fiber waste g and the carding process based on the setting of the carding clearance 0026 fig6 shows a block diagram of an electronic control system which has a control and regulating device 33 for example a microcomputer connected to an inputting device 34 for the desired carding clearance the drive motor 28 a display device 40 a further inputting.