User manual ELECTRO-VOICE 911 DATASHEET

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ELECTRO-VOICE 911 DATASHEET: Download the complete user guide (564 Ko)

Manual abstract: user guide ELECTRO-VOICE 911DATASHEET

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[. . . ] 5 1. 2 Enclosure Rigging Hardware Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 XLC Rigging and Flying Techniques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2. 1 Array Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2. 2 Rigging an Array Using the XLC Front Dollies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Insert the quick-release pin into the hole on the upper enclosure that will give the desired vertical splay angle and through the slot on the swing arm. Make sure that the quick-release pin on the upper enclosure is fully locked in the rigging frame and that the swing arm is fully secured. Repeat this process for all the suspended enclosures on both sides of the array. ON EACH ENCLOSURE, ALWAYS MAKE SURE THAT THE LEFT AND RIGHT SWING ARMS ON THAT ENCLOSURE ARE LOCKED INTO THE SAME HOLES FOR THE SAME VERTICAL SPLAY ANGLE. THE QUICK-RELEASE LOCKING PINS ARE TETHERED TO THE REAR RIGGING FRAME WITH A LANYARD. THE QUICK-RELEASE PINS MUST ONLY BE LOCKED IN THE REAR RIGGING HOLES ON THE FRAME TO WHICH IT IS TETHERED. Grab the clips on the sides of the dollies and pull them away from the sides of the enclosures until they unlatch from the rigging frame. Continue this procedure until all the loudspeakers are rigged at the back. 11 ELECTRO-VOICE® XLC TM Rigging Manual Initially, the rear rigging will be slack as the array is lifted. As more enclosures are suspended, the rear swing arms in the top enclosures will go into tension. If it is desired to lock the enclosures at their vertical splay angles when in compression as well as in tension, the lifting should be paused so that the second quick-release pin can be installed in the hole immediately at the end of the swing arm. Second pins are usually only necessary when a pull back is used, or when arrays with large arcs are assembled. The total strength of the overall enclosure; which is a function of the combined forces from all of the rigging points acting on the rigging frames and enclosure as a whole. The array designer must be aware of the working-load-limit ratings and the loads being applied to the individual rigging points and the overall enclosure. It is usually the case that one of the working-load limits will be approached sooner that the other. WHEN SUSPENDING ANY XLC LOUDSPEAKER SYSTEM OVERHEAD, THE WORKING-LOAD LIMITS MUST NEVER BE EXCEEDED FOR EACH INDIVIDUAL RIGGING POINT, OR THE OVERALL ENCLOSURE. The forces acting on each individual rigging point and on the overall enclosures in an XLC flying system will vary with each array configuration. Determining the forces throughout an array requires complex mathematical calculations. Electro-Voice engineers have, however, defined a set of simplified structural-rating guidelines that eliminate the need for the complex calculations for most array configurations. The interaction of the complex forces throughout arrays were analyzed to develop this set of conservative guide-lines, presented below, to enable a rigger to immediately determine on site whether or not an array is safe without having to make weight-distribution calculations. The structural-strength ratings of the individual rigging points and the overall XLC enclosures are also presented below so that a complex structural analysis can be made for any array configuration. The reader should consult an experienced structural engineer to perform the complex structural analysis. The reader is directed to the References section of this manual for a list of rigging references (for background in general rigging practice) and mechanical engineering references (for background in structural engineering analysis). [. . . ] Always double check that each pull-up grid is securely locked to the front button bar assemblies and the rear swing arm assemblies on the XLC enclosures before lifting. Never exceed the limitations or maximum recommended load for the pull-up grids. Chain Hoists: Prior to each use, inspect the chain hoist and associated hardware (including motor, if applicable) for any cracks, deformation. Broken welds, corrosion, missing or damaged components that could reduce the hoist strength. [. . . ]

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