Jump to content


Photo

Arri 16 Variable Speed Motor Requirments


  • Please log in to reply
4 replies to this topic

#1 Gary Lemson

Gary Lemson
  • Basic Members
  • PipPipPip
  • 155 posts
  • Other
  • Santa Cruz Mountains

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.
  • 0

#2 John Sprung

John Sprung
  • Sustaining Members
  • 4635 posts
  • Other

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.
  • 0

#3 Gary Lemson

Gary Lemson
  • Basic Members
  • PipPipPip
  • 155 posts
  • Other
  • Santa Cruz Mountains

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')?
  • 0

#4 Jean-Louis Seguin

Jean-Louis Seguin
  • Basic Members
  • PipPipPipPip
  • 750 posts
  • Other
  • Montreal, Canada

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
  • 0

#5 John Sprung

John Sprung
  • Sustaining Members
  • 4635 posts
  • Other

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.
  • 0


FJS International, LLC

Media Blackout - Custom Cables and AKS

Broadcast Solutions Inc

New Pro Video - New and Used Equipment

Abel Cine

Paralinx LLC

Willys Widgets

CineTape

Visual Products

Rig Wheels Passport

Ritter Battery

Gamma Ray Digital Inc

rebotnix Technologies

The Slider

Technodolly

Tai Audio

Metropolis Post

Wooden Camera

Glidecam

Aerial Filmworks

CineLab

FJS International, LLC

Metropolis Post

Glidecam

Media Blackout - Custom Cables and AKS

Rig Wheels Passport

rebotnix Technologies

Ritter Battery

Technodolly

The Slider

Visual Products

CineLab

Paralinx LLC

CineTape

Abel Cine

Wooden Camera

New Pro Video - New and Used Equipment

Broadcast Solutions Inc

Aerial Filmworks

Tai Audio

Gamma Ray Digital Inc

Willys Widgets