A method for detecting the sharpness of cutting edges of the chopper knives

摘要

The present invention relates to a method for detecting the sharpness of cutting edges (16) of chopping knives (1) on a rotary driven chopper drum (14) of a forage harvester with a counter cutting edge (19) and a grinding device (15) with an abrasive stone (2) for resharpening of the chopper knives (1), wherein by means of at least one electrode (3) as a contact sensor (27) a behind the cutting edge (16) of the blade surface (5) at least a chopping knife (1) is scanned, and the contact time of the at least one electrode (3) with the blade surface (5) is detected.