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11.2 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.
11.3 Holding the pan bar to steady the platform, disengage the centre lock (12).
11.4 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.
11.5 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.
12
When fore and aft balance has been achieved, carry out the payload C of G height adjustment as
follows:
12.1 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.
12.2 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.
13
When the payload C of G height adjustment is complete, check that the fore and aft balance remains
satisfactory. Re-adjust the position of the sliding plate if necessary.
14
After balancing, release the brakes
operates smoothly.
Operation
Locking the platform
15
The centre lock mechanism is operated by a plunger
engaged by holding the platform level and pushing the plunger inwards until the release lever
Use the pan bar to rock the platform slightly whilst pushing the button. To release the centre lock, rock the
platform slightly and push down on the release lever (12).
(18)
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
(2)(3)
and exercise the head through both axes to confirm that it
(11)
on the right-hand side of the head. The lock is
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(12)
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