An agricultural baler for forming and wrapping cylindrical packages of crop material. The baler includes a sledge assembly moveable between a starting position and full bale position. A plurality of rollers on the sledge assembly cooperate with an apron to define a bale forming chamber. Wrapping is accomplished via a system that includes a dispensing mechanism carried on the sledge assembly for dispensing sheet material, such as net or the like, into the bale forming chamber whereupon it is wrapped circumferentially around a formed cylindrical package of crop material as it is rotated in the chamber. The net wrapping system includes means for controlling the position of the dispensing mechanism relative to the sledge assembly by continuously sensing its position.