L-Acoustics V-DOSC, Руководство оператора

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L-ACOUSTICS V-DOSC Manual Version 4 6/29/2005 Page 114 of 158
The first step is to line up the enclosures at the rigging location (while they are still face down on their
dollies). As a reference for cabinet orientation, enclosure stacking runners will be oriented upwards
and rear jack plate V-DOSC logos will be upside down once the array is flown (see Fig 95 a).
Enclosures are mechanically connected together using the rotating legs and U pins. Use the locking
safety pins to secure all U pins in place. (see Figs 95 b-e)
Place the BUMP2 bumper at the top of the array. The bumper is mechanically connected to the top
cabinet in the same way that the cabinets are joined together, i.e., by rotating BUMP2 legs into
position on the top enclosure and securing them using U pins. (see Fig 95 f-g)
Connect the top enclosure to BUMP2 using two BUMP angle straps on the side flytrack sections to
secure the top enclosure to the bumper (NOTE: the site angle for the top enclosure is set by angling
BUMP2 during the final step of array angle adjustment). (see Fig 95 h)
Referring to the angle strap values that have been pre-determined using ARRAY 2004 or
SOUNDVISION, proceed to connect one end of all angle straps to the flytrack sections on both sides
of all enclosures of the array. Available angle straps values are: 0.75, 1.3, 2, 3 and 4 degrees - by
moving a 0 degree angle strap one hole location closer, 5.5 degrees is obtained.
Although exact flytrack hole location is not critical (since the length of the angle strap bar controls the
angle between enclosures), as a reference you can position angle strap double stud fittings so that the
shackle is located in flytrack hole location 3 from the end.
Orient angle straps so that the ring end of the fitting is facing to the left (down once cabinets are
flown) and the fitting is located at the left side of the flytrack (bottom of the flytrack section once
flown) in flytrack hole position 3 from the end.
Note: If angle straps are connected with the text out it is convenient to perform a last minute check to
confirm that all values are correct. In addition, when the array is flown, all angle strap labels will be visible
from the rear - this is useful as a check and makes for a cleaner installation. (see Fig 95 i)
Connect all enclosures to the amplifier racks using V-CABLEs and V-LINK jumpers between
enclosures for parallel operation (NOTE: it is best to connect cables from amp racks to the cabinets
first and jumpers last in order to avoid cable reversal). Longer cables can be routed over the BUMP2
or secured with a spanset. For additional strain relief, velcro straps or tape can be used to secure
cables to the U pins on every other V-DOSC enclosure. (see Fig 95 j-l)
Route two ratchet straps through the U pins of the bottom enclosure and over the bumper. Orient
the ratchet strap so that the ratchet handle is accessible (see Figs 95 m-n). Note: as an alternative to
ratchet straps, spacer blocks can be employed. (see Figs 95 i-iv). As a general rule, ratchet straps are
acceptable when the system is pointing downwards, spacer blocks should be used when the system is
pointing upwards.
Remove all dolly pins. As the array is flown, cabinets will automatically lift off the dollies (see Fig 95o).
Conduct a final inspection to make sure all cabling is correct, correct angle straps are in place and
securely seated in the flytrack, all U pins are fully inserted and all U pin safeties are locked in place.
Attach the rear chain motor to the rear BUMP2 fly point using a shackle. (See Fig 95 p)
Do not connect the front chain motor yet – this can be done once the first few cabinets are flown.
Note: For added safety factor when flying large arrays, bridling should be employed. For bridling, 2 steel
slings are attached to the outer points on the bumper using shackles then joined using a pear ring for
attachment to the motor (requires 2 steel slings, 4 shackles, 1 pear ring per point).
With three people available, one person runs the chain motors while the other two attach angle straps
(and insert spacer blocks) as the array is lifted. Stagehands can be assigned the tasks of steadying the
array from behind, providing necessary cable slack, and removing/stacking dolly boards.