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Arri 16 Variable Speed Motor Requirments


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#1 Gary Lemson

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Posted 19 December 2010 - 01:18 PM

Hello,

How much current (nominal-continous) do these motors pull?

Any issues in powering an ARRI 16 variable speed motor from a 12V battery?

Thanks.
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#2 John Sprung

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Posted 20 December 2010 - 01:57 AM

The nominal design voltage is 8.4. To run from a 12 volt battery, there are a couple precautions. You can't use the external 400 ft magazine, as its torque motor is designed for 8.4. Start with the rheostat at the slow end, and take great care never to overspeed the camera.

I don't remember an exact number for the current, IIRC it's in the low single digits.




-- J.S.
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#3 Gary Lemson

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Posted 20 December 2010 - 08:25 AM

"...You can't use the external 400 ft magazine, as its torque motor is designed for 8.4..."


Thanks, John.

Does this apply to the 16M, which only has an external mag (typically 400')?
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#4 Jean-Louis Seguin

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Posted 20 December 2010 - 08:56 AM

Hello,

How much current (nominal-continous) do these motors pull?

Any issues in powering an ARRI 16 variable speed motor from a 12V battery?

Thanks.




Typically, the motor draws around 2.5 A when running at 24fps.

Cheers,
Jean-Louis
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#5 John Sprung

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Posted 20 December 2010 - 12:28 PM

Does this apply to the 16M, which only has an external mag (typically 400')?


No, the 16M will be fine on 12 Volts, because its magazine is gear driven by the camera motor, just like the 35mm Arri's. Very few 16M's were made, they're quite hard to find now.




-- J.S.
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Wooden Camera

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Visual Products

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Opal

Paralinx LLC

CineLab

Technodolly

The Slider

Rig Wheels Passport

Gamma Ray Digital Inc

Metropolis Post

Ritter Battery

Willys Widgets

Abel Cine

Broadcast Solutions Inc

rebotnix Technologies

FJS International, LLC