Vinten Vector 75 Manuel D'utilisation page 11

English
Position the payload fore and aft as follows:
Ensure that the centre lock is engaged (see Locking the platform on page 11) and that
the camera and all accessories are fitted.
Turn the tilt drag adjustment knob [11] to its minimum setting.
WARNING!
Increase the balance setting for a heavy, out-of-balance payload BEFORE
disengaging the centre lock, to prevent the platform tipping violently.
Holding the pan bar to steady the platform, press down the release catch [17] to
disengage the centre lock (see Locking the platform on page 11).
Push the clamp lever [12] downward to release the slide plate clamp and pull out the
slide plate adjustment knob or 'T' bar [13] until it engages with the platform drive. Turn
the 'T' bar 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 Maintenance on page 12), 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:
WARNING!
Keep a firm grip on the pan bar to steady the camera payload.
Be prepared to prevent the head falling away suddenly.
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 and turn the Perfect
Balance adjustment knob [15] clockwise to increase the C of G height setting. If the head
tends to spring back to centre, push and turn the Perfect Balance adjustment knob [15]
counter-clockwise to decrease the C of G height setting.
NOTE: The Perfect 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.
When the payload C of G height adjustment is complete, check that the fore and aft
balance remains satisfactory. Readjust the position of the slide plate if necessary.
After balancing, release the brakes and exercise the head through both axes to confirm that it
operates smoothly.
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