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FAQ’s: problems
Why does the VOLT vibrate when turning up power beyond 50% - resonance from control box?
Answer: Not all sleds will vibrate when the power is turned up. It all depends on the payload weight and
mass/rigidity of the sled and secure mounting of the VOLT Control box. If a light camera weight and a
lightweight rig are being used, a high TILT or ROLL setting may cause the motors to be too strong for
the setup. This may cause the VOLT to overshoot the amount of correction it needs to apply to stabilize
the sled, resulting in vibration. Also, for those sleds other than the M-2, if the VOLT Control box is not
rigidly mounted to the stage, vibration can be introduced into the box which will result in vibration of the
motors.
Why is my rig swinging (sh bowling) all over the place?
Answer: There are 2 typical causes for a seemingly uncontrollable sled.
(a) The GOOFY/NORMAL setting of the VOLT motor drive has not been properly set. This can be
corrected by powering up the VOLT in PAUSE mode, removing the plastic plug in the Motor Drive unit,
and using a small plastic or wooden object, depress the pushbutton just under the plug and holding it
until the LED inside the Motor Drive starts to blink at a different rate (for about 6 seconds). Holding the
button down for any less than 6-seconds will result in the setting not being maintained in memory.
(b) The pan encoder is unplugged or defective.
Bad Pan Encoder? How to test for a bad sensor?
Answer: Power up the VOLT normally and lock in a tilt angle without panning the sled. Next, pan the sled
left or right 90°. If the tilt angle remains unchanged and the sled is operating normally, the Pan Encoder
is OK. Otherwise replace the encoder or contact your service center for assistance.
Why do I see the rig pan left and right when I am at a lock off?
Answer: The VOLT is a system that only controls 2 of the 3-primary rotational axes of movement: Tilt and
Roll. The Pan axis is still in full control of the operator and governed by inertial mass of the sled. This axis
is not compensated for or controlled by the VOLT so it may tend to drift while operating. To help combat
this, the inertial mass of the sled can be increased by moving the battery and monitor masses further
out. This will result in added stability and reduction of unwanted left-right panning of the sled.
Why is the rig panning when I tilt?
Answer: Since the VOLT is only in control of the tilt and roll axis and not the pan axis, this axis is free to
rotate. Any slight left-right imbalance or shift of balance when tilting of the sled will cause it to pan left or
right. Fortunately, this artifact can be overcome or nulled out by simply adjusting the stage balance left
or right until the sled does not pan anymore. The addition of more pan inertia on the sled will also help
by spreading out the battery and monitor rods to full extension.
Why is the VOLT less effective with a “close/tight” build – monitor and batteries close to post?
Answer: The VOLT system relies on pan inertia of the sled to maintain pan stability. Tightly built rigs
sometimes will not have enough pan inertia to adequately compensate for rotation of this axis.
I need to dynamically operate for fast adjustments for headroom. Does Tilt affect Roll?
Answer: No, once the rig pan angle has been set at power-up, the TILT and ROLL controls adjust motor
feedback directly aligned with the camera’s tilt and roll axes, independent of the pan orientation.
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