Comments on: Motorized projector screen

By: Warkani

Warkani — Mon, 23 Feb 2009 22:52:14 +0000

Hi!!!
please i seem to have a problem viewing the whole thing. if possible, pls send it to my mail…dblack4wattrow@yahoo.com. thanks… Warkani

By: los

los — Thu, 20 Jul 2006 22:20:05 +0000

Does anyone have the pictures and instructions for this? The links are dead.

Thanks!

los

By: singh_probin

singh_probin — Wed, 01 Feb 2006 02:01:53 +0000

Hey Brad, its Probin here. I just gone through your project and found it very interesting to be implemented, but the problem is that I can not figure out the various components and their connections clearly. So, if you can provide me with detailed information regarding this project then it will be a great help for me. You can mail me at singh_probin@yahoo.co.in I’ll be waiting for your responce. Thanks!

By: Ovidiu predescu

Ovidiu predescu — Thu, 26 Jan 2006 05:23:00 +0000

I built a remote controlled projection screen a while ago. It’s slightly more complicated as I couldn’t hang the screen from the ceiling, so I had to put it on top of a cabinet.

Here is a link to my blog entry describing the project:

http://www.webweavertech.com/ovidiu/weblog/archives/000429.html

By: lechon

lechon — Wed, 25 Jan 2006 19:08:24 +0000

I have to agree with max, those wrinkles have got to be distracting. Especially on dark scenes. We’re currently working on a HT setup using a 100″ screen that has some slight wrinkles, it’s driving us up the wall. The wrinkle is not that bad, but it’s enough that we can see it…especially on scenes that pan. Anyone know the best way to remove wrinkles from a Dalite glass bead pull down screen?

By: max

max — Tue, 24 Jan 2006 11:11:45 +0000

Wrinkles are not visible during playback? i think someone needs a pair of fresh glases, not to spoil the fun but watching a movie on a surface thats not very flat is like watching the waters surface with small waves on it and saying the image is not distorted. Theres a reason for why the screens that have a frame are insane expensive.

By: Johannes

Johannes — Mon, 23 Jan 2006 12:40:07 +0000

You might want to have a look at Carsten Heuer’s project using two old scanners to integrate a motorized projector screen into his shelf unit (see URL under ma name). Sorry, the descripion is in german, but the pictures at the bottom should be clear enough.

By: flaunt_dzx

flaunt_dzx — Sun, 22 Jan 2006 19:41:13 +0000

Brad, he was the E-Business manager at Fastenal up until last year. The corporate office is in Winona, so I thought you had worked there.

Just thought I’d ask.

By: monster

monster — Sun, 22 Jan 2006 11:59:09 +0000

well brad, if you want a few different aspect ratios, why not get a microcontroller and use some IR proximity sensors on your wall, push a button for “game” and it lowers the screen to the right size for games, “movies” for movies, etc.

click my name for the sparkfun.com ir proximity sensors.

By: Brad O'Connor

Brad O'Connor — Sun, 22 Jan 2006 10:53:27 +0000

flaunt_dzx, where is this todd t. from? and what does he do? I am a sales rep in the madison area, and I went to school at winona state.

By: jaded

jaded — Sun, 22 Jan 2006 07:42:24 +0000

Actually, the limit switch might be easy to implement if you can somehow use the “parking sensor” inputs to shut down the motor.

Have you ever examined how old garage door openers used to build their limit switches? It’s really neat, actually. They connect a long piece of threaded rod to the shaft assembly that operates the drive sprocket. They then mount switches near both ends of the threaded rod, and put a captive travelling nut on the threaded rod itself. As the motor spins, it screws (or unscrews) the captive nut along the shaft. When the nut hits the switch, the door shuts off.

That may be overkill, of course. Dr. Cross’ sugestion is much simpler.

A limit switch doesn’t imply that you can or can’t stop the screen travel anywhere in between. It just prevents the motor from spinning so far that it damages your equipment.

By: Brad O'Connor

Brad O'Connor — Sun, 22 Jan 2006 06:10:51 +0000

I thought about a limit switch, but the aspect ratio can vary a lot between my games, dvds, and HDTV. So I figured it would be best to just manually adjust right now. Maybe I can set it up with 3 different settings or something. If you guys missed it there is a video. I repdated my site with some “corrections” and I forgot I never saved it after I made the bigger video link. So look at the upper left. “screen in action”

By: flaunt_dzx

flaunt_dzx — Sun, 22 Jan 2006 06:10:49 +0000

Brad: Fastenal eh? Know Todd T.?

By: Ethan

Ethan — Sun, 22 Jan 2006 04:38:51 +0000

Wouldn’t adding more weight *increase* the severity of the wrinkles? What causes them, I suspect, is the uneven amount of tension across the horizontal span of the screen, which is in turn caused by the sides of the screen not being evenly cut/framed. The only way to remove them would be to recut/reframe the screen material to more exacting (i.e. straight and right) dimensions, while weighting the outside corners slightly more than the center.

By: DR cross

DR cross — Sun, 22 Jan 2006 02:56:55 +0000

Cool project brad, the only suggestion I could make is to put limit switches on the screen so the motor stops automatically instead of waiting by the switch to stop it yourself. some of those light sensitive sensors might do the trick, when the bottom of the screen passes by one it cuts the light and so the screeen stops.