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7.7
Confirm that the lever is in the locked position. This is indicated by coloured bands above the
lever. When the green band only is visible, the lever is locked. If any of the red band can be seen, the
lever is not locked.
7.8
Install the remainder of the payload (lens, zoom and focus controls, viewfinder, prompter etc).
Balancing the head
NOTE: It is important that the pan bar(s) and all camera accessories (lens, zoom and focus
controls, viewfinder, prompter etc.) are fitted in their operational position before balancing
the head. Any equipment fitted or adjusted later will unbalance the head.
8
Balancing the head consists of positioning the payload fore and aft on the head so that its C of G is
immediately above the platform pivot, then compensating for the payload C of G height using the balance
adjustment knob.
9
Position the payload fore and aft as follows:
9.1
Ensure that the centre lock is engaged
camera and all accessories are fitted.
9.2
Turn the tilt drag adjustment knob
WARNING!: If the balance control is set to minimum, a heavy out-of-balance payload
will cause the platform to tip violently when the centre lock is disengaged. Increase the
C of G height setting (see below) prior to balancing a heavy payload.
9.3
Holding the pan bar to steady the platform, disengage the centre lock (12).
9.4
Release the sliding plate clamp
sliding plate fore and aft to achieve horizontal balance. The horizontal balance is correct when no
perceptible tilting force can be felt on the pan bar with the platform level. Apply the sliding plate clamp.
9.5
If there is insufficient movement in the sliding plate to achieve balance, reposition the wedge
adaptor
(See "Repositioning the wedge adaptor" on page
balancing procedure.
10
When fore and aft balance has been achieved, carry out the payload C of G height adjustment as
follows:
10.1 Using the pan bar, tilt the platform forward and backward. When correctly balanced, there should
be no perceptible tilting force on the pan bar at any angle of tilt and the head should remain in any tilt
position to which it is set.
10.2 If the head tends to fall away when the platform is tilted, push in and turn the balance adjustment
knob
(10)
clockwise to increase the C of G height setting. If the head tends to spring back to centre,
push in and turn the balance adjustment knob
setting.
NOTE: The balance adjustment knob is a multi-turn control. To enable the knob to be turned more
easily, tilt the platform using the pan bar whilst turning the knob.
(See "Locking the platform" on page 17)
(17)
to its minimum setting.
(13)
and turn the sliding plate adjustment knob
25), refit the load and repeat the horizontal
(10)
counter-clockwise to decrease the C of G height
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