Anti-collision controllers mounted on each travelling bridge read their position from linear encoders. They measure the position and speed of each crane and calculate dynamically the necessary free space in the direction of movement, depending on the actual braking capacity of each crane. When there is no more free space available, the crane is ordered to cut off its motors. The cranes exchange their data.
All types of driving mechanisms – single speed, double speed or variable-frequency controlled cranes can be managed with the system.
The system prevents movement of the crane bridge if no data is coming through, although it comes equipped with manual overrides.
The system is not compatible with zone exclusion or jib cranes, but the AC 340 system the company is launching later this year for its main market, tower cranes, will be able to manage these situations, the company said.
