Question regarding projector throw angle (due to ceiling drop issue) - AVS Forum
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post #1 of 8 Old 11-11-2013, 04:41 PM - Thread Starter
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Hello all , long time lurker. Love this site!

Anyways , I am setting up my new home basement with a dlp projector. (optoma hd131xe)

The room dimension is 12 ft wide by 22 ft long. Ceiling height is 7'8".

The problem I have is my ceiling drops down along the right side of the room 8". (see pic) due to duct work. The projector will be mounted roughly 15"8" from the screen and calls for a 9" drop from the center of the lense to the top of the screen.

If this is the case the projector would actually be above the right side of the ceiling which I would believe it would cause some kind of issue.

The pic attached shows where the screen would roughly go. Circled in red is the drop in ceiling.

Any ideas would be appreciated , i'm a bit of a noob.

Thanks!


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post #2 of 8 Old 11-11-2013, 08:06 PM
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i may have missed it, but you didn't say how high the projector will be mounted. how high is the top of the screen?

the easiest thing i can suggest is to take a laser and hold it at the spot where the projector's lens will be. if you can hit the top right corner of the screen, you should be fine. all you need is line of sight from the lens to the screen

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post #3 of 8 Old 11-13-2013, 10:21 PM
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My. 02....I'd plug in the pj with no source just blue screen and hold it up above your head closest to the best of your ability to where it will be mounted. You should be able to tell if the bulkhead will get in the way. Judging by the pic though I think it should work out. I'd try my suggestion though.

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post #4 of 8 Old 11-14-2013, 09:58 AM
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If you do hit the drop ceiling using the proposed setup, consider lowering the pj a bit more (reduce the vertical offset)

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Originally Posted by fierce_gt View Post

..the easiest thing i can suggest is to take a laser and hold it at the spot where the projector's lens will be......

What a great idea - I've always used string!
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post #5 of 8 Old 11-14-2013, 07:52 PM
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Quote:
Originally Posted by DGF View Post

If you do hit the drop ceiling using the proposed setup, consider lowering the pj a bit more (reduce the vertical offset)
What a great idea - I've always used string!

funny you would say that, cause hearing you suggest string seems like brilliance to me, haha. I was trying to think of something many ppl are likely to have, or be able to get cheaply, then gave up and figure laser was close enough.

of course, some careful measurements and 9th grade trig could work too tongue.gif

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post #6 of 8 Old 11-14-2013, 08:44 PM
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So, the projector lens is 9" above the top of screen? How far below the soffit is the screen, how much over-lap to the side.

Throw is 15'8", what is screen width?

Let me start out saying I THINK you will be OK, but I'm not positive.
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post #7 of 8 Old 11-20-2013, 07:50 PM
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Okay aimetti, what's the answer? You can't leave us hanging like this - will it or won't it clip the edge of the lowered portion of your ceiling??
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post #8 of 8 Old 11-21-2013, 06:15 PM - Thread Starter
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Hey Guys


Thanks for all the comments. I kind of forgot about this thread haha.

So I hooked everything up, and as most of you said it worked. The projector is about 9 inches from the ceiling to the center of the lens and easily drops below the drop ceiling. About 3/4 inches. Came out great. Ill throw up some pics later.
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