21
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21.1 Turn the tilt drag (10) to zero. Release the centre lock (5) and the tilt brake (14). Turn the balance
knob (4) counter-clockwise until the head falls away from horizontal under the weight of the camera.
21.2 Release the slide plate clamp (1) and slide the camera backwards or forwards until it balances
horizontally. Apply the slide plate clamp (1).
21.3 Turn the balance knob (4) clockwise until the camera does not fall away when the head is tilted
and released.
21.4 Repeat Para 21.2 and Para 21.3 until perfect balance is achieved, when the camera will remain
set at any angle from +90° to –90° without falling away or springing back. Re-apply the centre lock (5)
and the tilt brake (14).
21.5 Press the switch (9) and make a note of the digital display (8). This will facilitate rebalancing this
particular payload.
Locking the platform
22 The centre lock mechanism is operated by a slider on the rear of the head. To engage the lock, hold the
platform in the horizontal position and push the slider (5) to the left.
23 To release the centre lock, push the slider (5) to the right.
Pan and tilt brakes
24 Friction brakes on each axis allow the head to be locked at any chosen position. The operating knobs
for the pan brake (15) and tilt brake (14) are fitted on the left-hand side of the head.
25 To apply the brake, turn the knob fully clockwise. To release the brake, turn the knob fully anti-
clockwise.
Pan and tilt drag
26 Both the pan and tilt mechanisms incorporate the Vinten thin film (TF) system to ensure smooth
movement of the camera about these axes and are fitted with control knobs to adjust the drag setting.
NOTE: If the digital balance setting of the particular payload is known, press the switch (9) and
turn the balance knob until the digital display (8) shows that setting.
NOTE: Maximum tilt angle is less than 90° for heavy payloads with a high C of G - see balance
graph (Fig 2.3).
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