Chopper Synchronizing System

NW271120-UN-15MAY06

Cane flow

The chopper system cuts clean, even billets and delivers them to the elevator while the cane leaf and dirt is removed by the primary extractor. This system is the most important in controlling quality cane samples. Wash chopper mechanism periodically to avoid bacteria growth. Lubrication is very important since the chopper system is both high speed and high impact.

The system consists of two rotary shafts with two sets of blade ends located 90° apart. Each blade is secured to the shaft with bolts, lock washers and a retaining bar. The shafts are driven by a single radial piston motor and are synchronized by timing gears. This is balanced by a flywheel turning on a separate shaft that is driven by the lower timing gear. The upper gear in conjunction with a lever arm adjuster is used to adjust the chopper blade timing.

The chopper synchronization system was designed not only to extend blade life but to improve and maintain billet quality. A close study of the picture at right, shows how the action of the blades resembles scissors.