APPARATUS FOR CONTROLLING YARN DIAMETER

摘要

PURPOSE:To decrease the yarn unevenness by providing a limit switch to a driving shaft of a gear pump of a spinning apparatus and using a controller to control the rotation of the driving shaft based on the signal transmitted from the limit switch and the signal transmitted from a fineness-measuring apparatus. CONSTITUTION:A limit switch 6 is attached to a driving shaft of a gear pump 1c in a spinning apparatus 1. A fineness-measuring apparatus 5 is placed between the take-up roll of 3 and a winder 4 of a spun yarn 2 and a driving motor 7 of the gear pump is controlled with a controller 8 and a controlling part 9. The rotation of the driving motor 7 is controlled by the controlling part 9 based on the pulse signals corresponding to the fluctuation frequency of the rotation of the gear pump detected by the limit switch 6 and the fineness signal measured by the fineness-measuring apparatus 5.