Importance

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Abstract

A method and apparatus is disclosed for detecting the position of a take-up package during an automatic doffing and donning cycle on a winder (10). The apparatus includes a chuck carried by a yoke assembly (60) and having two opposing chuck arms (70, 71) for clamping the take-up package for rotation therebetween. Chuck arms (70, 71) are mounted for relative movement among three positions--a first position wherein the chuck arms (70, 71) are further apart than the length of the take-up package in order for the take-up package to be placed therebetween for donning; a second position with the take-up package properly donned on the chuck arms (70, 71) for winding and a third position wherein the chuck arms (70, 71 ) are closer together than the length of the take-up package. A pusher (76) attached to a yoke shaft (75) engages and disengages the rollers carried by the lower end of chuck arm (71). A circuit (90) is provided which provides an alarm if the chuck arms (70, 71) have assumed the third position and a take-up package is not properly donned onto the chuck arms (70, 71).

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First Claim