CONTROL OF THE MOTION OF A RECIPROCATING MEMBER

摘要

In a method of operating a yarn traversing mechanism of the kind in which a reciprocating member is driven from a power source through at least one force-transferring member and in which the motion of the reciprocating member is adapted to be damped by a damping device, the improvement which comprises: detecting the time of zero velocity of the reciprocating member; actuating the damping device at a point in time between said zero velocity and a point when the increment of velocity of the reciprocating member above the desired velocity is a maximum if no damping is applied; and deactuating the damping device after such a short time that the damping does not cause undesirable distortion of the force-transferring member.