here are a couple if pics of my vertical design. i stole the threaded rod idea off someone in the forum. forget who. seems to work pretty well. i have the rods extending straight through the bottom and the top of the case. i have feet on the bottom and may thread handles onto the top when i'm done. the footprint is 16"X17" and it is about 36" tall. waiting for the replacements fresnel so i can get my picture in better focus and avoid the light leakage i seem to be getting around the projection lens. still a little dim and blurry. i am projecting 18 feet across my room so the picture is a little more than 10 feet wide. i'm using the 400 watt pulse strike with the strandard ballast. anyone using a more powerful bulb than this? i'll wait for the new lenses to arrive, but i'm not sure if it will help the brightness issue as much as I am hoping. in the meantime, time to build a big ol' screen.

comments? questions? crickets?

and

and

back, switches, louvred vent, lcd controls, air intake slot

cover

cover on

standing guard. so cute!

Nice job. Reminds me of HAL.
John

Looking good. May have to steal, ahem, I mean adapt that design... lol!

-fly

Impressive

HAL9000. Perfect.

Thanks.

I like that allthread rod design. That would make so stable and tight. Plus it'd be easy to adjust your spacing if you change your lcd , light etc.... Nice, CS

Cool I really like how the vertical design is turning out.

I tried a threaded design once... Gave up because I got frustraded when I was taking the parts on and off I put the lens on backwards.... then the lcd backwards... maybe it would of helped if I planned it out better hehe.

i was up late one night imagining the light path from the bulb through the lenses, hitting the mirror, flipping over, and reversing through the projection lens. then a day later i realized i had the whole thing backwards in my mind.

i was relieved when i finally tested it and the image was both rightside up and not reversed.

the design is stable and tight as pointed out, but i nailed and glued two adjacent sides onto the base and top panels. this makes the nuts on one corner harder to reach for adjustments. However, if i didn't do this, the assembly would have been too wobbly to test with the box open. if i were to start over i would try to find some metal sleeves or something to insert into the wooden frames to make them slide along the threaded rods easier. they have a tendency bind and the threads buzz off a little wood dust which i have to clean off the screen and lenses.

Nice work. Do you have any pics of your projector in action?

Better some sawdust than metal filings that could short your electronics. I was thinking maybe vinyl hose or nylon for sleeves in my threaded design.

The frames where fresnels and the lcd are attached... Why do they have holes in the corners ? Why not just slots ? Thus you could loosen the nuts enough and tilt the fresnel/lcd you want to turn a round ?!? If you're worried that the threaded rod could fall off the slots you can make every second frame have the slot vertical and every second horizontal !!!

Consider press fit T nuts for the plywood frames. They are available at Lowes
John

slots would have been a good idea. I am currently stuck trying to get past this situation with the supposedly bad condenser lens in the pro kit. I got a substitute lens from edmund optics, but it han't produced the results i am after.

ahh well.

Nice lookin' machine.
Whats the angle of the mirror? How big is the mirror? What kind of mirror did you use? Do you think you could give me some measurements? I really liked your pj. Good job

How's the pj coming along aflurry? Any pics?

Yes, very nice case there,
What kind of wood is that?, kinda looks like poplar

It looks like plywood...

Whatsup Tha your pj looks like its coming along very nicely, I to have a verticle design and like yours my mirror set closer to my pro lens than some designs where they have it right next to the LCD or the last frensel my question is when I use a FS mirror in my design (which is like yours) I could not get my picture to focus until I replaced the FS mirror with a RS mirror , now I do have a slight ghosting problem but only I notice it all my friends and family who have seen it cannot tell,are you having any problems trying to focus your image where your mirror set ,any info you have would be greatly appriecated.


RR

not sure if this is a dumb question or not, but why did you not build the projector upside down from the way you did (bulb on top and lens on bottom)? Just thinking this would be a better solution as far a heat goes (heat rises...)??

Elken2004 has tried this method. And as you have suggested it is a good way to deal with the heat. But he also found that the salts in the MH lamp tend to deposit on the bottom of the arc vessel and interfere with the light. This resulted in brown coloured patches on screen.

DJ

I know the bulb needs to be centered, but could you not mount it at a slight angle (but still centered) so any deposits will fall to the tip of the bulb?

I have a question about the FS Mirror / triplet "sled," because the sled is movable, the triplet can be fixed in this type of design, correct?

I really like this style.

I'm building one that looks very similar to this atm.

Technically, the triplet is adjustable, just vertically instead of horizontally . To answer your question without being a jacka**, yes the triplet can be fixed to the "sled" that hold the mirror and triplet.

Have you fired that up yet? I cant help but think that the walls in the enclosure are aweful thin. My Haas enclosure in 3/4" Apsen and the heat split it right down the long axis from dowel rod to dowel rod on both sides. And it was painted with high temp paint to boot. I would watch the wood carefully when you start using it to make sure it isnt bowing or splitting.

How did you make that small box with the PRO Lens?

What is the measurements? And how did you "find" them?

How to find out exactly where to put the PRO Lens?

Pics Please. I'm interested in how well your image turned out. I guess I would expect it to be blurry, since the mirror is so far away from the LCD, but I'm hoping you prove me wrong, with just a couple pictures.

Cheers!

Fulcrum

Any update on this pj ???