Vinten Radamec Fusion FHR-120 - Manual (Page 26)

Fusion FHR-120 robotic pan and tilt heads
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2. Hold and steady the camera cradle, then disengage the tilt lock [5]. Carefully release
the camera cradle and observe how it moves and where it stops.
• If the camera cradle stops in a horizontal position (camera pointing directly
forward) the balance is correct.
• If the camera cradle tilts forward (points downwards), then the camera must be
moved towards the rear of the head (aft).
• If the camera cradle tilts backwards (points upward), then the camera must be
moved towards the front of the head (fore).
3. Reposition the camera as required on the camera cradle and secure in position. The
horizontal balance is correct when the camera cradle comes to rest in a horizontal
position.
4. If there is insufficient movement within the camera mounting slots [1] to achieve
horizontal balance, reposition the camera mounting plate (supplied with the camera)
on the camera as required and refit to the camera cradle.
5. Tighten the screws securing the camera to the cradle and recheck the horizontal
balance. Readjust if necessary.
Centre of Gravity (C of G) height adjustment
When the fore/aft balance is correctly set, the vertical C of G of the payload against the tilt axis
can be set. The following procedures describe how to check and adjust the C of G height
alignment.
Checking the C of G height adjustment
1. Switch OFF power to the head [13] and disengage the tilt lock [5].
2. Tilt the camera approximately 30° upward and release it.
• If the camera stays in the same position when released, the payload is properly
balanced with the C of G on the tilt axis. Continue with step 3 of this procedure.
• If the camera continues to move upwards after releasing the camera cradle, the
payload is mounted too high—lower the camera cradle (see ‘Adjusting the height
of the cradle on the tilt axis’ below).
• If the camera moves back towards the horizontal position when released, the
payload is mounted too low—raise the camera cradle (see ‘Adjusting the height of
the cradle on the tilt axis’ below).
3. Tilt the camera cradle through positive and negative angles of travel, checking that
the head remains at the angle of tilt it is set to.
• If the camera cradle angle falls or rises, repeat the alignment procedure as
required until balance is achieved.
NOTE: If a teleprompter is attached to the mounting holes [2], it may be necessary to attach
counterbalance weights to the teleprompter extension arms.