Device for lifting and lowering the ring rail of textile machines such as twisting frames.

摘要

The device comprises a motor M driven alternately in opposite directions. Its rotational motion is transformed into alternating motion by a system with a screw (10) and nut (11). The motor M is controlled by a programmable logic controller (16) and a programmed scanner (17) is associated with the nut (11) controlling the raising and lowering movement. The scanner enables the position of the component (belt) controlling the bank of rings to be read at each instant. This makes it possible to carry out a series of steps laid down beforehand in relation to the particular bobbin to be produced. <IMAGE>