Originally Posted by grapper
Yeah, I have a Chief KITPD003 kit. Find it rather hard to get it right on my own with this heavy projector. Any other tips on how to know if pj is square to the screen?
Nothing really. I don't have a good link on how to properly setup a projector with lens shift so it is fully squared to a screen, but at the end of the day it is call 'square' because it's supposed to look square. If your projector looks at all like what you have it right now, it's not square.
Here's the way I do it...
I shrink the image so it's just a couple of inches smaller than the screen frame - maybe half an inch smaller.
I align the top of the image with the top of the screen image. Make sure it is level (no tools, use your eyes).
Now I look at the left/right side of the image. If the image is smaller on one side or the other, I rotate the projector towards the smaller side.
I then use lens shift to position the image back on screen. I realign the top edge of the image with the screen, and recheck the left side/right side sizing. I repeat this process as many times as necessary until the left and right side of the image is the same size.
During all of this, the top and the bottom may NOT be the same size. I am strictly checking the left side/right side for sizing.
Once the sides appear to be the same size, I check the top/bottom.
Once again, I align the top edge of the image so it's against the top edge of the screen.
Then I compare it to the bottom edge. If the bottom or top edges are smaller than each other, I tilt the projector up/down towards the smaller edge.
Then I use lens shift to align the top edge of the image to the top of the screen.
Repeat this process until the top/bottom are the exact same size.
Now, zoom out a bit until the image fills the screen. It should be 100% square. (It likely will not be)
If it is not, start at the beginning and work your way through the process.
Each of these steps takes a few minutes to go through. You get on a ladder, you get off a ladder, you double check, you triple check. Once it is perfect, you check again, and you find out it isn't. So, you start from the beginning.
Each round through the full process tends to get you closer and closer and closer. Rarely is it perfect, and rarely are screens 100% square. Typically a top edge or bottom edge isn't 100% straight across. But, it gets extremely close. Far closer than you have it now.
Give it the time it deserves. I've been doing this for years, and still find that a good adjustment, with a good mount, is about a 30 minute process. So if you spend an hour or so working through the process, don't think of it as a big deal.