Load turning operation

During load turning, diagonal pull between the two hoists is unavoidable so Konecranes developed special features for safer load handling in this application. Our die handling cranes only allow the load to be turned in a closed system as the hoists are pulled towards each other so no forces are introduced into the building structure.

Bidirectional overload sensing: After lifting a load higher than the load capacity of the small hoist, it is not permitted to lower the hoist with the higher load capacity during the entire turning process. Lowering the die in an inclined position is only permitted with the smaller lifting gear. If one hoist is overloaded, the other hoist is blocked in its lowering movement and only lifting at creep speed is possible. This prevents the overloaded hoist from being overloaded even more by lowering the load with the non-overloaded hoist.

Diagonal pull monitoring: The maximum permissible rope angle is measured during the entire turning process. If the permissible rope angle is exceeded, an emergency stop is generated and a fault message is displayed.