the disturbance compensation is connected at the proper time subject to the prerequisite that the disturbance changes only slowly it can be assumed that within two successive revolutions the disturbance remains practically constant at one place if a disturbance integrator is now employed for this particular place it notes a constant control deviation which it can reduce by integration for the n zones on the circumference i e for the n angles of rotation u03b1 there must also be used n integrators which integrate the control defect as a function of the angular position the periodic disturbance is then reflected in the n integrator contents as an example 24 integrators can be used where the reel is considered portioned into 24 sections or zones since the system has dead times and the control has a low pass behavior the outputs of the integrators may not be connected only when the system is in its integration interval their effect would then come too late instead one must look into the future by a lead angle this lead angle results as a function of the rotational speed as in which n i is the instantaneous speed of rotation of the reel 11 t v is the lead time and u03b1 o a constant offset angle fig2 shows a circuit configuration for realizing the above mentioned strategies at the inputs e1 e2 e3 fig2 there can.