{HEAD ~ The magnitude} of {TAIL ~ the extra rotation} of said motor has to be set to a value which reliably covers at least the possible tolerances of said valve element and any slacks within the force transmission path between the motor and the valve element 
of
{ HEAD ~ The magnitude } of { TAIL ~ the extra rotation } of said motor has to be set to a value which reliably covers at least the possible tolerances of said valve element and any slacks within the force transmission path between the motor and the valve element
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH