Synchronisation of time constants in yarn handling system - with all spinning units controlled by common program, modified by presettable time delays

摘要

Device is provided for synchronisation of the time constants of means for supplying yarns and rearward feeding, drawing and winding of yarns in open-end spinning rotor machines having a number of spinning units each of which has an individual set of the means controlled by a common program. Each spinning unit has a control circuit which is controlled by the common program. Each circuit has an operative element which is preceded by a settable element which determines the rate of transition of the element from its rest position to its operative position and vice versa. Yarn breaks can be eliminated in individual units using a common machine program.