Methods of detection and prevention for snags or off center lifts, and auto-centering a crane over a load. Snag detection includes monitoring angular deflection of the load with respect to an at-rest position, and halting movement of the crane in a direction of increasing angular deflection. Controlling off center lifting includes detecting a side load condition for a load, and preventing a hoist operation when the side load condition is detected. Auto-centering a load includes determining a position of a block coupled to the load with respect to a trolley of the crane, and centering the trolley over the block prior to a moving operation. Centering includes comparing a position of a block marker using a trolley camera to a known centered position of the marker with respect to the camera, and moving the trolley to match the determined position of the marker to its known centered position.


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    Titel :

    CRANE MOTION CONTROL


    Beteiligte:

    Erscheinungsdatum :

    2016-02-04


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Klassifikation :

    IPC:    B66C Krane , CRANES



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