a method for cross - winding of thread - like or band - like winding material on winders is described for the production of bobbins wound up in cross - winding with random winding or precision cross winding . the winding material is traversed by a slit drum comprising a slit and is wound up to a bobbin . the winding material is traversed by a slit drum comprising at least three parts forming the slit and at least one crossing point . the winding material entering the slit drum is guided by an auxiliary apparatus , which forces an additional motion to the winding material while passing each crossing point of the slit of the slit drum to maintain the corresponding traversing direction .