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Screen flatness?

Discussion in 'Projectors, Screens & Video Processors' started by Sieze, Aug 17, 2004.

  1. Sieze

    Sieze
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    I bought a busy-base manual screen this week. When is is lowered it is not completely flat but has slight ripples in it. I admit I can't notice them when watching a movie but is this normal? It was £250 for a 2 meter wide screen with beaded glass material - should I expect it to be perfectly flat or not? Will this improve over time? The screen is mounted on the ceiling so I assume it is horizontal, any advice will be gratefully recieved.

    Also when it retracts I have to take the weight off it to stop the screen from locking before it fully retracts. In other words I have to help it shoot up as quick as possible. Does this mean it is defective?
     
  2. Gary Lightfoot

    Gary Lightfoot
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    Ripples and edge curling are common from retractable screens that don't employ tab tensioning, but sometimes adding a little weight to the bottom bar can help.

    Gary.
     
  3. Timmy C

    Timmy C
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    Common problems yes but that doesn't make it any more acceptable and I doubt it will get any better with time! If I were you I'd have words with the dealer it came from about getting a replacement.
     
  4. Gary Lightfoot

    Gary Lightfoot
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    Unless you get a tab tensioned screen, it can't really be avoided - if it was, tab tensioning wouldn't be required.

    Gary.
     
  5. Sieze

    Sieze
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    Thanks for the advice Gary and co. Makes me happier about it .
     
  6. ReTrO

    ReTrO
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    Tab tensioning can be avoided by making a material with a clever structure to stop it curling across the screen. This is what Vutec did for their VuFlex Pro fabric.

    Thus you have a fabric that rolls up fine, but will hang as flat as a tabbed screen, and be much cheaper. :)

    And some of the heavier wieght matte white fabrics can hang well. I have an old 80" wide 4:3 screen that was pretty much flat and used for the best part of 2 years.
     
  7. Gary Lightfoot

    Gary Lightfoot
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    Interesting stuff - how long has it been around Richard? Do any other manufacturers use a similar structure, or is tab tensioning the only other method employed to ensure a flat screen?

    Gary.
     
  8. Messiah

    Messiah
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    Owl's Othello Homevision screens hang perfectly flat, and I mean like a piece of glass. I have had 4 of them (all 8ft horizontal) and not even 1 tiny ripple on any of them. With screens like this you certainly don't need tab tensioning - other than for pose factor :D

    I had a Draper Luma before these and that was a joke re ripples.
     
  9. Gary Lightfoot

    Gary Lightfoot
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    How do they prevent the ripples Neil?

    How come you had 4 of them? Didn't they make a 32ft wide screen? :D

    Gary.
     
  10. ReTrO

    ReTrO
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    The VuFlex Pro, in it's current form, has been around for about 2 years now. The original was a bit thinner and didn't hang as well. But they added the extra internal tensioned layer and it gives a flat screen. I'm not sure if it is patented, but I would expect so. It's a 1.3 gain fabric.
     

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