Maximum safety when turning heavy loads

Demag has introduced a new standard function for its Universal Crane product range. With an optional package of features, crane installations can now be equipped with a load-turning function without any additional engineering. Demag says that the additional costs are modest and  the benefits are high. It is made possible, in part, by monitoring the entire load turning process using the Demag SafeControl safety control unit.

Every so often, users of indoor cranes are faced with the complex task of not only lifting and horizontally moving heavy components such as press tools, machine beds or special containers, but turning them, too.

This function has been possible with Demag cranes for decades, but it required significant additional engineering. Demag has standardised the ‘load turning’ option to such an extent that it requires much less individual engineering work for universal cranes with two hoists without impairing the intrinsic high level of safety.

Demag says, “The user benefits from the high levels of safety and functionality at an attractive price.”

The package of features enabling the ‘turning of loads’ function includes more generous specification of the steel structure and the equipment with additional sensors. In addition, the Demag SafeControl system, which provides safety-orientated control and monitoring of all crane motions and functions, has been modified for the load turning process.

Depending on the requirements for the size of the rope hoists, an inclined angle of pull of up to 20deg can be achieved. With the universal cranes modified in this way, loads weighing up to 50t can be turned.

The user can choose between two safe versions. Precise measurement of the rope angle is achieved by combining the Demag SafeControl system with a two-channel, non-contact sensor system. With the basic version, an acoustic and visual warning is given as soon as the maximum deflection angle is reached.

In the safest configuration, the Demag SafeControl system monitors all motion sequences in terms of safety and automatically stops lifting and travel motions if the maximum permissible rope angle is exceeded. A high safety category is achieved: Performance Level d (lifting) or c (travelling) to EN 13849-1, category 3.

On both variants, the load turning function is wirelessly operated by joystick transmitters as standard, allowing intuitive control while keeping an eye on the load to be turned. Alternatively, control is also possible via hand-held button transmitters or hand-held transmitters with mini-joystick operating concept.

With this option, Demag offers tool and mould manufacturers and companies that produce and use special machines and installations an interesting special function in crane operation that is both safe and easy to implement.