Jump to content



Photo

a new take-up clutch question


  • Please log in to reply
2 replies to this topic

#1 dan kessler

dan kessler
  • Basic Members
  • PipPipPip
  • 162 posts
  • Other

Posted 26 April 2017 - 07:13 PM

Do any of you camera techs know if there is a typical recommended value

for take-up tension in 1000' 35mm magazines?

 

I've got a spring scale hooked into the rim of a 2" core mounted on the

take-up hub.

 

Thanks.


  • 0

#2 Dom Jaeger

Dom Jaeger
  • Basic Members
  • PipPipPipPip
  • 1384 posts
  • Other
  • Melbourne, Australia

Posted 26 April 2017 - 09:56 PM

What camera?

 

Older Arri mag tensions were measured with an Arri tension gauge that used numbered divisions that equated to newtons of force. The recommended value written on the gauge for 1000 ft mags for 35BL series cameras was 8. 400 ft mags were set to 5.

 

The gauge used a string with a hook that latched into the slot of a film core, so the string would wrap around the core before pulling on the gauge.

 

Newer cameras like Arricams use mags with electronically controlled tensions that shouldn't need adjusting.


  • 0

#3 dan kessler

dan kessler
  • Basic Members
  • PipPipPip
  • 162 posts
  • Other

Posted 26 April 2017 - 10:19 PM

This is a camera I built.  My scale has newton and gram calibrations so the Arri values might just work.

I'll give it a try tomorrow. Thanks again.


  • 0


Technodolly

rebotnix Technologies

Gamma Ray Digital Inc

Quantum Music Works

Metropolis Post

The Slider

Paralinx LLC

ZoomCrane

Visual Products

Media Blackout - Custom Cables and AKS

Glidecam

FJS International, LLC

Abel Cine

Aerial Filmworks

Willys Widgets

Tai Audio

Rig Wheels Passport

CineLab

CineTape

Broadcast Solutions Inc

Ritter Battery

Pro 8mm

Broadcast Solutions Inc

Technodolly

ZoomCrane

FJS International, LLC

Paralinx LLC

The Slider

Tai Audio

Visual Products

Media Blackout - Custom Cables and AKS

rebotnix Technologies

Pro 8mm

Metropolis Post

Ritter Battery

Aerial Filmworks

Rig Wheels Passport

Gamma Ray Digital Inc

Abel Cine

Quantum Music Works

CineTape

Glidecam

Willys Widgets

CineLab