VARIZOOM Cinema Pro JR Operation Manual - page 21
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Jib Counterweight Option
Some lightweight jibs may not have enough mass to neutralize the high acceleration and
torque of the CP Jr head. If the motion of the head causes your jib to sway from side to
side in a way you want to eliminate, we have a counterweight option that will effectively
eliminate the problem.
Heavier jibs will not be affected much, and the effect is only significant during sudden
moves. Adding our counterweight to the CP Jr balances out the rotational inertia so even
lightweight jibs will not be susceptible to the swaying effect caused by sudden moves.
Attaching the counterweight is
simple. Before attaching the
counterweight, fix the head to your
jib.
(1)
Start by attaching the interface
plate to the head with the 4 small
screws (supplied). Now fix the
support arm to the interface plate
using the supplied thumbscrews,
lockwashers, and flat washers. Put
the flat washers between the support
arm and the lockwashers to prevent
scratching. Tighten the
thumbscrews thoroughly.
(2)
Now attach the square weight to the support arm, using the same type of
thumbscrews, lockwashers and washers.
Tighten the thumbscrews thoroughly.
The counterweight adds about 7 lbs total
weight to the system, so if you don’t need it,
try operating without it first. Also note that
some swaying may be caused by the camera
platform being out of vertical balance –
remedy this by adjusting the camera
platform up or down so the camera’s center
of mass is on the center of tilt rotation.
(1)
(2)