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post #1 of 6 Old 10-03-2001, 10:58 AM - Thread Starter
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I have an old projector with a 1.3 gain screen. The screen is attached to an aluminum frame by snaps. Once the screen is all snapped up, the middle of the screen from top to bottom tends to bend in. I somewhat solved this problem by making a brace to run in between it. All this said, the problem that happens is that the screen looks like it has waves in it coming from the stage left side and gradually disappear toward the middle. It is driving me crazy. If anyone has any suggestions it would be greatly appreciated. If I can't fix it, I will probably go the DIY route since so many people seem to success with it.

Thanks in advance!
-Keith

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[This message has been edited by keithmcelhinney (edited 10-03-2001).]

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post #2 of 6 Old 10-03-2001, 08:59 PM
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Keith:
Sounds like that screen is a goner. I don't think you will ever get it right. Buy a new one. Are you using a CRT projector? How old? Depending on which projector you have, you might want matte white, or glass beaded for more brightness.

A/V is only as good as your weakest link.
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post #3 of 6 Old 10-04-2001, 10:35 AM - Thread Starter
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Well that just stinks! The screen was that way since I bought it. DAMN! Looks like I save up a bit and get new one. I have an old Runco IDTV-800. Not the brightest thing so maybe I will step up the gain.

Thanks - Keith

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post #4 of 6 Old 10-04-2001, 03:27 PM
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First of all, if it is a new screen, ask for a replacement. If it is any of the larger screen companies they are usually very good about that kind of stuff. If you do decide to get a new one with a higher gain, glass-beaded is usually frowned upon for various reasons it seems. Do a search and see why.

Tim
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post #5 of 6 Old 10-05-2001, 03:36 PM
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Keith,

Maybe I am not understanding the problem exactly but it would seem that the snaps are not putting enough tension on the screen to keep it from causing these "waves".

I am assuming that you have some space between snaps along the top of the frame. Why put on new snaps between the old ones. Attach new snaps to the screen material in the same locations but a little farther down on the material so that when 'snapped' the tension on the screen is better thus eliminating the 'waves'

Rick
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post #6 of 6 Old 10-06-2001, 02:47 PM
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I am curious about the location of your screen. Is it by chance located anywheres near a heat source like a furnace, heat vent, etc?

Your screen is exhibiting something called "sag."

If this happened right from the very beginning then the screen is not tensioned properly which would be a manufacturing defect.

If it has happened over time then it could be screen sag which can happen when the vinyl screen stretchs due to a heat source near it.

Lee
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