One of the prime concerns on any mining or quarrying site is safety, especially around moving parts. Conveyor belts are good for moving large volumes of material, be it iron ore, cereals or road base, but they also need some method of stopping them quickly in case of emergency.
Running alongside conveyors are cables which, when pulled, cause a switch, usually some distance away, to trip and stop the conveyor. While the switches have to be sensitive to the operation of the cable, they must also be able to withstand the vibration inherent in the conveyor system due to various factors, such as the motion of the conveyor idlers.
VSS was asked to help in the design of a vibration system to allow the switches to be tested under various vibration parameters, such as frequency and force of vibration. They designed a vibrating table with a single vibrating motor and a variable frequency drive to replicate the conditions on mine site conveyors.