Open Forum

we are considering doing a production with projections in 
Our black box and we have some projectors in our building but our problem is that after a bit it goes into pause mode and projects a blue screen. Any suggestions on how to avoid this? About the only thing we can think of is closing the lens cover,but that not only overheats the rejector, but also means the operator and the projector itself must be in the middle of the audience. I'd like to mount it overhead. Depending on the throw we might be able to do a rear projection instead, but not sure. Any and all suggestions would be appreciated.
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Holly Thompson
Worthington OH
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Most projectors have the ability to change the length of time before the projector shuts itself down and again most allow you to change the blue "no signal" screen to black.

I usually send a black powerpoint/keynote screen when not projecting an image. This means the projector always has something to project and hence doesn't go into pause.

Some projectors also have a "shutter" which can be used to douse the output - like putting something in front of the lens but without the overheating problem.

Rear screen, if you have the backstage space id the best - no shadows if an actor or prop moves into the light path.

Good luck

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Rod Reilly
Somerset NJ
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Rod's comment about projecting a black image is correct.  The projector has to think it's doing something to stay in 'normal' mode.

If you can provide us with the projector make and model, and the type of lens it has (if is an aftermarket accessory), then we can better advise you about your projection options.  Also, let us know what type of screen material you have, or of you are open to renting / purchasing the preferred material.  How large of an image are you trying to create? (Width x Height)

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Erich Friend
Theatre Consultant
Teqniqal Systems
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One comment about the black slide idea is the reality that you will then be looking at "video black" and it will be visible to the audience. We have rented (and finally purchased) a dowser. It uses one channel of DMX. This is a link to the creator's website: 

http://prodowser.com/prodowser.html

Best Wishes,

Dana

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Dana Taylor
MSD of Mt. Vernon
Evansville IN
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This ProDowser is simply a remote controled version of a student placing a piece of cardboard in front of the lens ... and it sudders the same long-term issues - shortened lamp life (if you are luck) and severe damage to the light engine and other electonics due to over heating.

No the best way to go if the projector is borrowed or rented.  If you own the projector - do what you have to.  No manufacturer would recommend this solution without additional cooling to get rid of the heat build-up.  -If the flag was lrger and was mount 10-12" forward of the lens with exhaust fans above I would have no such qualms.

This may work much better with the new laser projectors that do not generate as much heat.

As for video black - that is true, and in a total blackout situation (tho these are no longer technically legal) you will be able to detect the "black image"

If the projectors are not used for the entire program, it is consceivable to shut them down and reboot them as necessry - with the necessary lead time and black image loaded, title screen set to black etc.  Many projectors allow remote control via a wired remote, or RS232 signal which can be send from a computers serial pert, many new ones can be remoted using an internet connection and a web browser interface.

Good Luck

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Rod Reilly
Somerset NJ
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Thanks to those who have responded. Here's a bit more information. The projectors I have available are Epson models Powerlite 83+. I'm not sure exactly what that means. Our depth from back wall to house hanging position is approximately 30 feet and our desired projection image would be approximately 20w x 16h.  I am open to possibly renting something.  
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Holly Thompson
Worthington OH
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