Electric roll down screens

Discussion in 'Displays' started by Sacha_C, Oct 13, 2003.

  1. Sacha_C

    Sacha_C Second Unit

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    I was looking on da-lite.com, why are normal pull down screens $100-200 and electric pull downs are $900+? It can't cost $700 to ad a $0.50 motor in it.

    Whats the catch? I might as well build my own electric pull down for $50.

    Thanks
     
  2. David Abrams

    David Abrams Stunt Coordinator

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    Sacha,

    Most electric roll-down screen are different from manual pulldown screens in that they are tab-tensioned. Tab tensioning is a system that uses tensioned cables on the sides of the screen to pull the screen flat and without wrinkles everytime. On a manual pulldown screen you will definitely have wrinkles and issues with the picture that will need to be corrected with geometry and convergence, ect. With a tab tensioned screen these are a non-issues.

    Also, check the screen materials, and the type of casing that is offered with the electic roll down screens, there are often many differences between options on these.

    Regards,
     
  3. Kimi-R

    Kimi-R Agent

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    There are several electric roll down screens at my work and none have tensioning, and the quality of materials looks the same as my $250 manual pull-down.
     
  4. Sacha_C

    Sacha_C Second Unit

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    Are the screen materials on ebay good?

    I was thinking of putting some on a frame, hinged to the ceiling at the top side, with a rope attached to the bottom of the screen with a motor to pull it up and down with sensors to check the rope tension to know when it's fully lowered and a touch sensor on the top to stop it when it's fully up.

    Would this be a good setup?
     
  5. Steve Marsh

    Steve Marsh Stunt Coordinator

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