L-Acoustics V-DOSC, Operator'S Manual

Page: 109 / 158

L-ACOUSTICS V-DOSC Manual Version 4 6/29/2005 Page 109 of 158
4. INSTALLATION PROCEDURES
In the following sections, detailed installation procedures for stacking and flying V-DOSC are
presented. Please follow these procedures carefully and at all times remain safety-conscious.
In addition:
•
Only users with sufficient rigging knowledge should attempt to install any L-ACOUSTICS
loudspeaker system intended for overhead suspension.
•
Users should be familiar with the rigging techniques and safety considerations outlined in this
manual prior to installation.
•
The V-DOSC rigging system is designed to comply with European Community regulations
(please see the CE conformity declarations in the appendix for specific recommendations).
•
Some countries require higher safety factors and specific rigging approvals. It is the
responsibility of the user to ensure that any overhead suspension installation of L-
ACOUSTICS systems is made in accordance with all applicable local or state regulations.
•
L-ACOUSTICS is not responsible for any rigging equipment or accessories that are not
manufactured by L-ACOUSTICS.
4.1 STACKED SYSTEM
For stability reasons, the maximum number of V-DOSC enclosures that can be stacked is 6 (total
weight including the bumper is 709 kg or 1563 lbs). The V-DOSC BUMP2 bumper is used as a
stacking platform and four corner screwjacks allow for tilt adjustment of the stacked system. Prior to
stacking, the strength of the supporting floor should be carefully examined to determine if the load can
be supported (if necessary, sheets of plywood or steel plates can be placed under individual screwjack
feet to help distribute the load).
Once the location for the stacked array has been determined, the BUMP2 is placed in the desired
location and oriented upside down so that the two rotating legs on the BUMP2 are free to swing
upwards. To install the corner screwjacks, lower the height adjustment blocks to the minimum
position. Mount the screwjacks on the corners of BUMP2 by sliding the blocks into the locating slots
on BUMP2 and then lower the screwjacks.
Note: For greater stability when tilting the stacked system downwards, the front pair of screwjacks can be
omitted and the front of BUMP2 laid directly on the stacking surface. Conversely, when tilting the system
upwards, rear screwjacks can be omitted.
Set the BUMP2 azimuth angle to provide the desired amount of array rotation on- or off-stage. If front
screwjacks are employed, raise the bumper at least 8 cm off the floor by rotating the screwjack
wheels (CW = up, CCW = down). This clearance is necessary to prevent screwjack wheels from
physically interfering with the dolly locator studs of the bottom V-DOSC enclosure.
Referring to the installation parameters determined using ARRAY2004 or SOUNDVISION, adjust the
screwjacks to provide the required tilt angle for the bumper (and therefore the bottom V-DOSC
enclosure). NOTE: A digital inclinometer is highly recommended for performing angle measurements.
For stability reasons, the maximum bumper tilt angle is 12 degrees so that the centre of gravity of the
stacked array remains within the physical footprint of the BUMP2.
The lowest V-DOSC enclosure is placed on the bumper with the two rotating legs oriented upwards
(as a reference for cabinet orientation, stacking runners on the cabinet should be on the bottom and
the rear V-DOSC logo in the correct orientation). Adjust the front-to-back position of the enclosure
by aligning the Aeroquip flytrack sections of the enclosure with the bumper. Mechanically connect the
first enclosure to the bumper by lifting the BUMP2 rotating legs up and locking them into the rear V-
DOSC rails using U pins. Attach two BUMP angle straps to secure the bottom V-DOSC and verify the
tilt angle for the enclosure using a digital inclinometer (use the stacking runner recess on top of the
cabinet for alignment of the measurement tool). Perform additional tilt adjustment using the bumper
screwjacks if necessary.