Control mechanism for round baler net cutting apparatus

摘要

An agricultural baler for making cylindrical bales of crop material having a sledge assembly moveable between bale starting and full bale positions. The sledge assembly includes a plurality of rollers which cooperate with an apron to define a bale forming chamber. A dispensing mechanism is carried on the sledge assembly for dispensing web material into the bale forming chamber whereupon it is wrapped circumferentially around a cylindrical package of crop material. A net supply assembly is associated with the dispensing mechanism to provide net for feeding into the bale chamber via the dispensing mechanism. Included along the feed path of the net is a net severing assembly for cutting the net after it has been wrapped around the cylindrical hay package. The net severing assembly includes a free falling knife for operatively engaging the net prior to entry into the chamber. A knife constraint system is employed to maintain the knife inoperative in a holding range while permitting it to fall in a release range. A control arrangement trips a latch that controls the knife drop under conditions where the constraint system is in the release range.