Ergonomic Considerations for Selecting An Optimal Conveyor Belt Height

The two considerations for setting conveyor belt height will depend primarily on the visual acuity required and downward force required. Generally, a degree of both will be required but the mechanics and posture related tradeoffs need to be considered. In a simpler example, if an object size is small there will be a need to raise the height closer to view, however, the tradeoff would be the weight of the upper body cannot use gravity so much to its advantage to apply pressure onto the object and allow the weight of the arms to relax the shoulder more.

Object size can differ at different stages of a process, so varying the conveyor belt height based on the size of the object at these various stages can help operators to maintain an optimal posture and mechanics. Since each process will have a set fixed belt height the work surface height must be set at an appropriate fixed height for the operators according to the size and force onto the material moved down the conveyor. Heavier tasks performed on larger objects require a lower work surface than light, higher precision tasks performed on smaller objects. 

A designer must consider setting a standing work surface height that accommodates the anthropometry (heights) of the worker population and it is best to provide adjustable platforms for shorter operators to stand on. This is much more practical than setting a lower working surface height that could require taller operators to bend down at the waist.

A designer may also consider a seated workstation. Working whilst seated helps to prevent the fatigue, however, it is best suited for low-force tasks like belt picking of smaller sized items. The strength capability when seated is lower than when standing.

Platforms should always be stable and clearly marked, having enough room for operators to move their feet while working.