CurtPalme.com Home Theater Forum

[mx83toy]

interesting about the screen size??? kinda wondering if i'll be gaining any size when i get the 8110 going in the same spot as my cine 7?? as i was planing on using the cine 7's 145's on the 8"er.... i know i'l be gaining lots of brightness and focus

[CxTurbo]

Glad to see that you found time to do the 9"LC swap!

Should look stunning when you are done and dialing it in. Are you swapping over your Frankenyokes to the 9" tubes as well or running with stock yokes? I'm still trying to build up the courage to put on my 6-pole stigs and G90 yokes myself. Just a little bit more work then I want to tackle at the moment. The board mods are moving along nicely thanks to your write ups and advice.

James

[mx83toy]

Updates Man!!!

[Nashou66]

The weather has been too nice to hide in the cellar.

Nashou

[mx83toy]

enjoy!!! you guys are going into winter soon correct? Make the most of the nice days whilst they are there.... hey i sent you an IM on FB if you dont have time for what i was asking please dont feel obligated (we have a busy business too) i understand.. Still looking forward to seeing what you beem out these babies now!!!!

[Nashou66]

Well I was in the theater today for a couple hours looking at things and wondering what to do next.
PJ that I swapped the tubes out of still only with one lens on the green. So I was looking at the
screen and got out the tape measure and calculator and began marking the 157" wide screen for
the two 1.33 aspect ratio halves of the Blend. The hight of the screen is about 65 inches for
a 2.4 aspect. So for the 1.33 aspect set up of each PJ that comes to about 87 5/8 th's wide , which
would give a 18.32 overlap.

I will definitely have to move the PJ's back and out to the side some. How far I am not sure.
That will depend on how much of the tube face I choose to use. After dealing with the AC units
and maxing out the maxing out the phosphor I have realized that it might be better to stay in about
a half inch more on the blend edge side. This will have less light output roll off of the tube and also
be slightly better resolving due better focus of CRT's as you get closer to the center and also
the better focus of the lenses . This should help get a more uniform output in the blend zone.


So Soon I will drop the One PJ I did the swap on and move it to the location that fills the screen
area I will tape off as the 4x3 aspect. Then I will have to remove the mounts and reposition them
to the PJ's new location.

13 foot screen is huge!!!

nashou

[Tim in Phoenix]

Hey Nash

Consider a fifteen to twenty percent overlap zone, which will not necessarily use max phosphor height or phosphor width

[Nashou66]

Well the overlap will be set in stone no matter what for the full raster use of the 1.33 aspect but the blend zone can be made larger
once its up. I never end up with the recommended zone because the final mounting and final use of phosphor will change everything.
the one thing I like to keep constant tho is the height. that then determines everything else.

[mx83toy]

I know what would make that setup perfect.... what you should do is sell me those mounting plates well ok my setup not yours lol....

Keep up the good work mate cant wait to see some pics of her up and running!!!!

[Nashou66]

Trying to work out getting JBmeyer here next week for a day to help . I'll pull the PJ's down set them up in s floor set up to be able to mark the roof locations then get them up and set up the geometry. Then I'll work on the CMS after were done there, wish he could get two days off then we'd get it done fo sho !

Athanasios

[Nashou66]

Here are the patterns I use. I had aluringreality who designed the AVSHD disc to make them for the blend.

[mx83toy]

I so got to download that disc im still using the ones on my hellboy bluray ***7669*** menu but im allowed to as im still new to this crazy sport

[ecrabb]

[Nashou66]

[ecrabb]

Dude... You're the "blend man", but with all due respect, I think there's a way easier, way more scientific, way more accurate way to do this. Your room has nothing to do with anything, and is only a recipe for inaccuracy anyway. Setting up on the floor, then trying to move it up from that location? Screw that. That's "winging it", and there are tools for this. It's all about the screen and projector(s), and nothing else matters.

Here's what I think would be the most systematic, accurate, and easiest way to nail the projector positions down... I did a couple of commercial installs this way, I did my friend's and my own this way, and I think Tim, Mike Parker, and any of the other guys that did big commercial setups - especially blends - would probably agree.

1. Mark out the screen, level and plumb. Everything else will be relative to the screen, so side walls or room shape are irrelevant.

2. Mark out one projectors' worth of the screen, again, level and plumb, with both center and edges. You know your single projector AR, so this should be easy. I like painter's tape, applied gently at edges, with engineering pencil or fine-tip Sharpie marks.

3. Set up the projector on that screen. Gnat's ass setup doesn't matter at this point. Just get it to 95% with rasters centered and play with throw and raster size to find your best tradeoff between edge sharpness and raster size. Shouldn't take more than hour or so, I would think. If you want to make sure keystone is exactly as it will be, measure the distance from screen center to ceiling, and duplicate that whatever you'll set the projector on, on the floor.

4. Make a note of the exact throw, from screen to mount, or foot, or whatever reference is most accurate and convenient. That's all that matters now. Everything else will be determined with math, relative to the screen.

5. Use a plumb line or level to transcribe each projector's center to the ceiling, right above the screen. You now have two points on the ceiling above the screen.

6. Use the pythagorean theorem and the two points to scribe two intersecting arcs about where the projectors will mount. You now have two points for each projector. When you strike a laser level across those two points, you have an extremely precise perpendicular to the screen.

8. Use your reference now and mount the mount so the projector's throw is exactly as it was on the floor. Both projectors will now be perfectly square to the screen, in exactly identical positions relative to the screen. It's mathematically perfect (down the 16" at least). No amount of dicking around trying to set up the blend on the floor will be that accurate, and you wont' have to do it all on the floor only to have to do it all over again on the ceiling.

Many moons ago, I wrote a pretty lengthy post about using a laser level to mount a projector perfectly square to the screen. You should do the same, but twice. The accuracy is even more important with the blend.

That's my two cents, anyway.

Cheers,
SC

[Nashou66]

I basically did it that way minus the laser level. And I was not planing on blending on the floor then moving it to ceiling. I meant just line up the 1.33 aspect dimensions tot he screen then transcribe that to the ceiling. I used strings criss crossed from edge to edge of PJ to screen edge. I then used blue tape to mark each string at the intersection. moved that to the floor once the PJ were out of the way. used a plumb line dropped down from the ceiling to the points on the floor( i did all four corners ) . I then measured out the mounting holes on the ceiling from the four points on the ceiling . then i used unistrut to cover the points. mounting and moving the PJ mount to the Unitstrut gave me the ability to fine tune the mounts final location. Then I lifted the PJ to the mount and from there the marquee mount gives you the ability to tilt and turn any final adjustments.

Nashou

[Nashou66]

Took me a freaking hour to get the covers back on the marquee!! Damn Canadian designers

Then it took my 10 minutes to remove the four bolts and lower the marquee.

Love the pulley mounts, ok canadians did something right here

http://www.youtube.com/watch?v=jpwS1fou9lk&feature=youtu.be

Athanasios

[jbmeyer13]

Yeah baby! Nothing got broken;-) Now we just need to figure out how to position them while they are in the same orientation as if hanging on the ceiling..

[mx83toy]

[ecrabb]