Balancing The Load; Using The Pedestal; Height Adjustment - Vinten Quattro-OBL Operator's Manual

Balancing the load

After pressurization of the pedestal, the pan and tilt head and payload can be accurately balanced,
as follows:
Exercise the moving column
in the mid-height position.
WARNING! A pressure retaining valve prevents pedestal pressure being
If the column tends to fall, remove a trim weight (1),
If the column tends to rise, reduce the pressure in steps of 0.15-0.20 bar (2-3 psi) using the
Schrader valve cap (16).
WARNING! The Schrader valve cap
Refit the Schrader valve cap (16).
A correctly pressurized pedestal will balance its payload such that it can be moved to any
position over the full on-shot stroke of the moving column, with minimum effort, and it will
maintain its position when the steering ring is released.
Fine balance and temperature correction may be achieved by adding or removing trim
weights.

Using the pedestal

Height adjustment

The column (6) has an on-shot stroke of 100 cm (39.4 in.) and the load can be moved over this
distance, in perfect balance, by raising and lowering the steering ring (3). The movement is ad-
justable for drag (17) and an on-shot clamp
if fixed height operation is required. A markable height indication scale
ond stage of the column. Operators can use this scale to record working heights to be returned to
whilst shooting.
WARNING! To ensure maximum stability, particularly when moving over
(6) over its full travel at least twice, then position the column
reduced below approximately 3.5 bar (50 psi)
Always replace the cap and screw it down finger- tight.
(10) can be used to hold the moving column in position
uneven surfaces, reduce pedestal height to a minimum.
Take care not to trap fingers under the steering hub or between
column elements while pedestal height is being reduced
(20) or increase pressure.
(16) forms a primary pressure seal.
(19) is provided on the sec-
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