Load Turning with Maximum Safety

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.

In order to enhance safety during this process, Demag has introduced a new standard function for its Universal Crane product range. Crane installations can now be equipped with a load-turning function that achieves maximum safety as an optional feature, eliminating the need for any additional engineering.

“The additional costs are modest, but the benefits are high,” says Emil Berning, Managing Director of Demag, “This is made possible, in part, by monitoring the entire load turning process using the Demag SafeControl safety control unit. We have standardised the ‘load turning’ option to such an extent that it requires significantly less individual engineering work for universal cranes with two hoists without impairing the acknowledged high level of safety.

“The customer will benefit from operating at the highest level of safety and functionality, two critical components in crane operations,” he adds.

The package of features enabling the ‘turning of loads’ function includes a more generous specification of the steel structure and the equipment with additional sensors. Additionally, the 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 up to 20 degrees 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 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 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, in addition to companies that produce and use special machines and installations, an interesting special function in crane operation that is both safe and easy to implement,” Emil points out.

“It’s technological advancements such as SafeControl that continues to cement our company’s reputation as a global leader in the manufacture of cranes that offer high safety credentials as well as innovative functionality that delivers a best performance for our customer’s operations,” Emil concludes.