Operators guide
21
Fore and aft balance
When positioning the payload it is important to be aware of the potential danger of an
unbalanced payload falling away suddenly. Before disengaging the centre lock [2], adjust the
Perfect Balance knob [5] to its mid-point setting (‘50’ on the digital display). Depending on the
payload weight, it may be necessary to increase or decrease this setting to enable the payload
to be correctly balanced fore and aft.
Balance the payload fore and aft as follows:
Ensure that the centre lock [2] is engaged and that the camera and all accessories are
fitted.
Turn the tilt drag adjustment knob [12] to its minimum setting.
Press the digital numeric display push button once to [4] display the counterbalance
setting.
Turn the Perfect Balance knob [5] until the mid-point setting is reached (approximately
‘50’ on the numeric display).
Holding the pan bar to steady the platform [17], disengage the centre lock [2].
Release the slide plate clamp [14] and pull out the slide plate adjustment handle [1] until
it engages with the platform drive. Turn the handle 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 [14] and push in the slide plate
adjustment handle [1] to its stowed position.
If there is insufficient movement in the slide plate to achieve balance, reposition the
wedge adaptor, refit the payload and repeat the horizontal balancing procedure.
Payload weight and C of G height adjustment
When fore and aft balance has been achieved, carry out the payload weight and centre of gravity
(C of G) height adjustment as follows:
CAUTION
Always refer to the counterbalance chart (Fig. 5) before attempting to
balance the payload. Always apply a suitable amount of counterbalance
BEFORE releasing the centre lock or the tilt brake lever.
WARNING!
Be prepared to prevent the head falling away suddenly. In the event of the
head falling away violently, increase the amount of counterbalance. When
the head is mounted on a tripod, always steady the payload by holding on
to the pan bar.
NOTE: If the digital balance setting of the payload is known, turn the Perfect Balance
knob until the digital numeric display indicates that setting.