The crane is equipped with two trolleys. These can be controlled using a joint pendant control (or transmitter). This improves safety during the transportation of e.g. long or bulky loads.
When fitted to a trolley, the LED matrix display can also show the numbers “1” and “2” to indicate the trolley assignment.
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Number of the trolley |
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● The assigned number of the trolley is displayed at the foremost position on the LED matrix display.
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Label “Trolley I” |
Label “Trolley II” |
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● The trolleys are labelled “Trolley I” and “Trolley II” on the wire rope hoist.
On a crane with trolley selection, it is possible to switch back and forth between trolley I and trolley II.
See the ABURemote product manual.
See the pendant control product manual.
On a crane with trolley selection and joint operation, it is also possible to switch back and forth between trolley I and trolley II in joint operation of both trolleys.
See the ABURemote product manual.
See the pendant control product manual.
The control is without synchronisation control. This can result in a change in the distance of the trolleys to one another, or in the position of the load during transport, for example, due to different loads placed on the drives with differing load distribution, to different braking differences and to tolerances of the components.
If changes occur in the distance of the trolleys to each other or in the position of the load:
Allow the crane to come to a
complete standstill.
Switch to trolley I or trolley
II.
Compensate for the changed
distance of the trolleys or the changed position of the load through
lifting/lowering or trolley travel to the right/left.
Switch to joint operation
again.
ABUControl has a synchronization control system. Thus, the synchronous travel of all crane axes is automatically controlled.
● ABUControl monitors the speed of the trolley drives and automatically controls the trolley travel speed. Thus, both trolleys travel at the same constant speed.
● ABUControl monitors the distance of the two trolleys to the respective end of the main girder, uses this to calculate the distance of the trolleys to one another, and controls the trolley travel speed so that the distance between the two trolleys remains constant.
● Only with twin hoist: The synchronization control system is deactivated shortly before the switching point of the top and bottom hoist limiters. This is necessary so that the wire rope on the two cable drums of the twin hoist can be balanced. During acceleration in the opposite direction, the synchronization control system is automatically activated again. The load hook thereby stops briefly.
In joint operation, the trolley travel limit switch and the hoist limit switch are evaluated jointly.
If one of the trolley drives brakes or halts, or if one of the hoists brakes or halts, the other trolley is also synchronously controlled.
If the crane is to be used to turn loads, the overload protection is possibly equipped with additional functions in order to also detect an overload of the hoist even when it is lowering or stopped.
See the order-specific crane documentation.
