Boom Stacker

A stacker has three basic movements:

• Luffing: this is vertical movement, stacker uses hydraulic cylinder to control the boom conveyor up and down.
• Travelling: stacker moves on a rail track, which may be broad or narrow gauge, enabling it to move along the stockyard as required. For this purpose, 3 in 1 (motor, gearbox, brake) driving unit are used in long traveling system of stacker.
• Slewing: this is rotation of the stacker around its central axis to align or place the stockpile where required. This works mostly by a slew pinion that rotates around a slew base. This type of gear assembly is called a sun and planet gear.