L-Acoustics V-DOSC, Руководство оператора

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L-ACOUSTICS V-DOSC Manual Version 4 6/29/2005 Page 115 of 158
With one person on either side of the array, raise the rear chain motor. Enclosures of the array will
bend automatically since they are connected by the rear pivoting legs and dolly boards automatically
detach as the cabinets lift off (see Fig 95 q).
When the first enclosure leaves the ground, stop raising the array. Lower the front motor and connect
the front rigging point on the BUMP2 to the chain motor (see Fig 95 r).
Note: A 1 m (3 ft) steel extension (stinger) is required for the front (downstage) motor attachment point in
order to prevent the motor chain bag from hanging down in front of the array.
Raise the front motor to the same height as the rear motor to level BUMP2 and the top V-DOSC
enclosure. Attach a laser and/or remote inclinometer on top of the first V-DOSC enclosure – use the
enclosure as a reference for attaching these measurement instruments, not the bumper.
Note: When installed and focussed, if the system is oriented downwards, the top V-DOSC enclosure will
tend to close against BUMP2. When the system is pointing upwards, there will be a small gap between the
top V-DOSC enclosure and BUMP2 due to mechanical tolerances. Always refer to the top V-DOSC enclosure
as a site angle reference – not the BUMP2 bumper.
Continue to lift the array. The two people on either side of the array then use the side handles to lift
the second V-DOSC enclosure up towards the first enclosure, allowing them to connect the angle
straps from the first enclosure to the second enclosure. (see Fig 95 s,t).
Note: If the rear motor is raised higher than the front motor while flying the system, the cabinets will tend
to close automatically, making it easier to attach angle straps. This is acceptable for smaller systems – for
larger arrays it is recommended to fly the system flat so that the load distribution between front and rear
motors is equal.
As a reference, attach angle straps from flytrack hole 3 to hole 3 between cabinets to provide the correct
inter-enclosure angles. When using the 0.75 degree angle strap to obtain 5.5 degrees, attach the straps
from flytrack hole 3 to 2.
Always make sure you have a solid physical mating between the double stud fitting and the flytrack - do not
hold the plunger out - simply place the fitting into the flytrack then slide the fitting into positon and listen
for a loud ''click''. Physically shake the angle strap to ensure that a secure physical connection has been
obtained.
Optional: Spacer blocks can be inserted on each side by attaching the hook and safety on the bungee
cord between cabinet handles then pushing the spacer backwards (towards the rear of the
enclosures) so that they are tightly wedged in between the boxes and all slack is taken out of the angle
straps. (see Fig 95 aa-dd).
Note: Ratchet straps or spacer blocks are required since as enclosures are added to the array, the weight of
the array tends to flatten the site angles of individual enclosures. Spacer blocks maintain the same inter-
enclosure angles whether the system is oriented upwards or downwards.
The array is progressively raised and this procedure is repeated until all angle straps (and spacer
blocks) have been connected to all enclosures.
Note: Up to 8 dolly boards can be stacked using the technique shown in Fig 95 u.
It is a good idea for someone to guide the array from behind as the system is flown (rotating legs on
the bottom cabinet are useful as handles for this purpose). Pay particular attention to steady the
bottom enclosure as it lifts off since it will tend to flip forwards. (see Fig 95 v).