TECHNOLOGY REPORT | PROCESS CRANES


RP The Jaso cranes in operation at the Irizar Forge plant.


blends. The positions of the cranes and the feeder bridges are also managed to ensure that any collisions can be avoided. To ensure the processes are completed


swiftly, the cranes reach long and cross- travel speeds of up to 80 m/min with a maximum lifting speed of 45 m/min – or 70 m/min for partial loads. The cocoa beans in the store are gently


picked up with a motor-powered clamshell grab. Boasting a capacity of 14 sqm, the grab is operated with a hydraulic control system featuring magnetic valves. Despite its impressive dimensions and high load capacity, the grab can be used for reliably weighing and handling smaller quantities. The quantities are continuously monitored and logged by the calibrated weighing system installed on the trolleys. Demag uses Dedrive-Pro 880 inverters


in all motion axes to facilitate variable travel, lifting and lowering. This provides for gentler handling and greater precision in positioning thanks to smoother acceleration and braking motions as well as reduced oscillation during transport. Moreover, electrical braking reduces wear


www.hoistmagazine.com | November 2022 | 37


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