Grinding arrangement for cutting choppers of drum-chopper machine

摘要

The machine drum (1) has a frame (19) the sides (4,4') of which carry a bar on which slides a carriage (5) holding a motor (10) driving gears (11,14) engaging a tensioned chain (13) and a sharpening stone which travels across the blades. Proximity sensors (20) cause reversal of the motor direction.