L-Acoustics V-DOSC, Руководство оператора

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L-ACOUSTICS V-DOSC Manual Version 4 6/29/2005 Page 35 of 158
A unique feature of the V-DOSC rigging system is the fact that the relative action of the front and rear
chain motors can be used to adjust the vertical site angle of the entire array. The rear rotating legs of
the entire assembly provide the mechanical connection and bear the majority of the load while the
angle straps determine the angle between adjacent V-DOSC enclosures. As the array is tilted
upwards, the overall centre of gravity shifts forwards and the load distribution progressively shifts
from the rear rotating legs to the angle straps. As a result, the maximum upward tilt angle is
approximately 5 degrees.
NOTE: Exact mechanical load conditions depend on the size, shape and site angle of the array. Always refer
to the mechanical data provided in ARRAY or SOUNDVISION software to verify that safe rigging conditions
apply with respect to load distribution.
NOTE: A single BUMP2 can safely fly an array of up to 16 V-DOSC enclosures, 15 V-DOSC + 3 dV-DOSC
or 14 V-DOSC + 6 dV-DOSC. Recommended chain motor ratings for each rigging point are as follows: 0.5T
motor per point for a 4-enclosure array; 1.0T motor per point for a 5- to 10-enclosure array; 2.0T motor per
point for an 11- to 16-enclosure array.
BUMP2 can also be used for stacking V-DOSC. In this case, the BUMP2 is inverted (upside down) and
the first enclosure of the array is stacked on the bumper. Since the depth of the BUMP2 is larger than
that of a single enclosure, this allows for better front-to-rear stability for the stacked array. Screwjacks
can be attached at the corners of BUMP2 and used to tilt the BUMP2, and hence the whole array
upwards (2 screwjacks at the front) or downwards (2 screwjacks at the rear). In this manner, the site
angle of the array can be adjusted to match coverage requirements. When stacking, angles between
adjacent enclosures cannot be obtained by gravity and spacers are employed in addition to angle
straps. Alternatively, rear ratchet straps can be employed to provide the correct angle between
enclosures in conjunction with the angle straps.
NOTE: For safety reasons, a stacked array should not exceed more than 6 V-DOSC enclosures high.
The DELTA PLATE rigging accessory is available to allow for pan adjustment of flown V-DOSC arrays.
The relative action of the 2 rear motors controls the rotation of the array as shown in the figure
below:
Figure 19: BUMPDELTA
1.4 SB218 SUBWOOFER SPECIFICATIONS