Weft feeder for weaving looms, including an independent optical unit integrated into the electromagnet group controlling the weft thread release

Abstract

Weft feeder for weaving looms including a winding group to wind a weft thread on a weft feeder drum, an optical unit provided with one or more optical sensors to monitor the weft thread winding on the drum and its release from said drum, an electromagnet group to control the movement of a stop pin which prevents the weft thread from being released from said drum, wherein said electromagnet group is enclosed within a cup-shaped shell from which said stop pin protrudes to interfere with said drum, and a weft feeder processing board which controls the logical functions of the weft feeder. The optical group is contained in a protection box and it is electrically connected to said weft feeder processing board by direct wiring, and said protection box is housed and removably fixed inside said cup-shaped shell.