AUTOMATIC POSITION CONTROL FOR ADJUSTING THE RELATIVE ANGLE BETWEEN A DISCHARGE SPOUT OF A HARVESTER AND A PIVOTALLY ATTACHED CROP GATHERING WAGON

摘要

An automatic control system operates to control the spout position on a forage harvester as a function of the position of a crop-receiving wagon and as a function of the relative spout-wagon position. The system includes wagon and spout angle sensors and a variable gain error amplifier for generating an error signal representing the difference therebetween. The gain of the error amplifier is modified according to changes in the wagon position to provide a wagon position dependent amount of free play in the spout-wagon relative position.