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16
Ensure that the centre lock is engaged (see Locking the platform) and that the camera
and all accessories are fitted.
Turn the tilt drag adjustment knob (11) to its minimum setting.
Holding the pan bar to steady the platform, disengage the centre lock (see Locking the
platform).
Push the clamp lever (12) downward to release the slide plate clamp and pull out the slide
plate adjustment knob (13) until it engages with the platform drive. Turn the knob to move
the slide 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 slide plate clamp (12) by pulling the clamp lever upward.
If there is insufficient movement in the slide plate to achieve balance, reposition the wedge
adaptor (see Servicing), refit the load and repeat the horizontal balancing procedure.
When fore and aft balance has been achieved, adjust the payload C of G height as follows:
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.
If the head tends to fall away when the platform is tilted, push in and turn the balance ad-
justment knob (15) 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 (15) counter-clockwise
to decrease the C of G height setting.
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 slide plate if necessary.
After balancing, release the brakes and exercise the head through both axes to confirm that it op-
erates smoothly.
WARNING! Increase the balance setting (15) for a heavy out-of-balance
payload BEFORE disengaging the centre lock (16), to prevent
the platform tipping violently.
NOTE: The balance adjustment knob is a multi-turn control. To enable the knob to be
turned more easily, slightly tilt the platform using the pan bar whilst turning
the knob.
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