10
Exercise the column several times over its full stroke.
Push down on the weight tray
and push the safety catch rocker switches
to the locked po-
sition.
Steering mechanism checks
Align the steering indicator
with the crab/steer pedal
and press the pedal to select CRAB -
3. Turn the steering ring and check that all three wheels turn together and all point in the same
direction.
with the crab/steer pedal
and press to select STEER - 1. Turn
the steering ring and check that two of the wheels lock in the straight-ahead position and that the
third wheel (below the pedal) is turned by the steering ring.
Fitting the pan and tilt head and camera
The OB Quattro pedestal has the standard four-bolt mounting plate
which permits the use of
various Vinten camera mounts including pan and tilt heads, Quickfix
®
and Mitchell adapters. To
fit a pan and tilt head or an adaptor it is necessary to extend the moving column.
Fit the pan and tilt head or adaptor as follows:
Ensure pedestal pressure does not exceed 3.5 bar (50 psi). Reduce as necessary, using
the Schrader valve cap
.
Push down on the weight tray
against residual pressure. At the safety catches
, push
the rocker switches to the unlocked position. Allow the column to extend under hand re-
straint.
Apply the on-shot clamp
Fit the pan and tilt head or adaptor and secure with the appropriate bolts.
Release the on-shot clamp
and lower the moving column under hand restraint. Push
down on the weight tray
and push the safety catch rocker switches to the locked posi-
tion.
With the pedestal locked in the fully depressed position, fit the camera and accessories to
the pan and tilt head, ensuring that all items such as pan bars, prompters, lenses etc, are
fitted. Attaching these items at a later stage may upset the pedestal balance.
Install one main
and two auxiliary trim weights
WARNING! A pressurized pedestal will rise rapidly when safety catch is
released. Do not lean over the pedestal when releasing the
safety catch. Always restrain the pedestal by hand pressure on
the weight tray when the safety catches are released.
WARNING! A pressure retaining valve prevents pedestal pressure being
reduced below approximately 3.5 bar (50 psi), indicated by the
yellow segment on the pressure gauge
In the event that pressure has fallen below this, pressurize the
pedestal to approximately 3.5 bar (50 psi) before attempting to
extend the column.