How to Set Up ASU's GeoWall

Room Selection

Well before your presentation, preview the proposed room. Are there stairs or other obstacles? Can you shut off all the lights, or leave a dim light on? Will it be possible to position the GeoWall about 10 to 20 feet from the screen? Is there electrical power nearby? Can the audience be positioned generally straight back from the screen on either side of the projector? Does everyone have a good view (not too crooked or too close)? Is something scheduled in the room immediately before your presentation? You will need an absolute minimum of 10 minutes to setup if you are very experienced. Allow more like 30 minutes if this is your first time. You will need to shut the lights off during setup so it will be best if you can do it when the room is unoccupied.

Physical Setup

Wheel the GeoWall into position. If you are pressed for time (say, only 10 minutes for setup) immediately plug in the GeoWall and turn the projectors on so they can warm up. (Press the green buttons near the front.)

Start the computer and log in. If you do not have much setup time, start your images loading as they may take awhile. Until they finish loading, the desktop background should be an alignment image.

Try to make sure the screen and the projectors are squarely facing each other (not crooked). Do not worry about precise alignment yet. Adjust the front knobs on the projector stand to get the projectors roughly centered on the screen. Somewhere along in here you are going to want to shut off the room lights so you can see clearly when things are lined up just right and focused correctly.

The projectors have two sleeves near the lenses. The outer one controls zoom while the inner one controls focus. Adjust both zoom sleeves until the images are about the same width and nearly fill the screen. (Don't worry about exact vertical alignment yet.)

Once the images are about the same size as the screen, lock the wheels of the GeoWall cart so it does not get bumped out of alignment.

Adjust the front projector stand knobs again so that both images line up near the top of the screen. If you cannot get perfect alignment of both images, it is usually better to have the error at the bottom rather than the top. If the images are not square you can either adjust the screen or adjust the projectors.

Now that both images are covering pretty much the same area on the screen:

Adjusting focus has probably caused some minor misalignment. This is the time to get everything lined up again the best you can.

Now at last you can put the filter stand in front of the projector lenses. Loosen the thumbscrews to slide the filter holders up or down until they are directly in front of the lenses. Instead of looking at the screen to see if the filters are in the right place, note that there will be a small bright square projected onto each filter. Move the filters until the square is centered in the filter.

Start or switch to the program displaying your 3D images. If you did everything right you should now be able to see 3D with your glasses.

When You're Done

Do not simply kill the power. This risks damage to the projectors and computer. Press the green buttons to shut off the projectors. They will need a minute or two to cool down. Log out of the computer and allow it to shut down. After everything shuts off you can remove power, unlock the wheels, and take it away.


Written by Marvin Simkin
Filename setup.html
Last updated August 25, 2004
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