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| Ultimarc Aimtrak lightgun on big screen - is it possible? |
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| Victorian:
Hello, I received my Aimtrak light gun today but have some issues with calibration. The screen is about 80 inches and distance to screen around 7-8 feet. After calibration the gun is perfectly accurate in upper left corner, but anywhere else it is far from accurate. The gun has problems hitting the last bottom calibration target. Im assuming the trouble is related to the IR-leds and the size of the screen, has anyone found a solution to this? |
| yotsuya:
http://www.arcadeguns.com/index.php?main_page=product_info&cPath=2&products_id=225&zenid=qj1mhtpmq9mgbonbjfum44otv3 |
| gamer83:
Like suya posted,you could use the super led.but before you spend some more money,try these things in different combos.go into the aimtrak utility and change the ir gain to 5,see if that helps.try backing up from the screen a bit more if you can and recalibrate.backup to 10 feet.also for the tracking accuracy change the z correction(?) to continuous in the aimtrak util. Hope this helps but the new led bar might be absolutely necessary for that screen. |
| Victorian:
Thanks for the tip, I bought my light gun from there but the super ir led bar is no longer available. I think Ill make my own ir led bar :) I did some calculations here. http://ostermiller.org/calc/triangle.html I set bottom right angle to 60 degrees. I set bottom side to half of screen width. Left side is distance from gun to screen. According to the manuals, the gun angle (top angle) should be 17 degrees or less for optimal performance. The gun has 60 degrees sensor width but it needs to see all ir leds and the ir leds are not placed in the center of the screen, thats why the gun can not point 30 degrees to each side. This means you have 17*2= ~34 degrees of movement freedom of the gun. In my case, 2 metre wide screen = 3.4metre distance required... I shall try with a TV tomorrow, its only 104cm wide so a distance of 180cm should be enough. Seems convincing enough, but I do not understand why custom built ir sensor bars with more distance between leds supposedly work better with big screens. When the sensor bar is made larger the gun cant move as freely to the sides because it still needs to see the led on the other side of the screen. Wider distance between ir leds would increase resolution and make the sensor more precise, but also increase the minimum required distance. If my theory is correct, would be great if someone could clarify :-) |
| gamer83:
have you tested the ir signal strength with aimtrak utility?not sure if you did,but theres a tab in the utility that can show you exactly where the camera stops seeing the leds.I had similar problems calibrating my guns,if I was too close to the screen the last calibration point on the bottom of the screen would not register,putting more distance between me and the screen fixed it.I have to stand minimum 6 feet from my 27" screen,with your beast 80 incher I dont think 7 - 8 feet is goin to cut it.Backup from the screen and you will decrease the view angle. up the gain,then use the AT utility and watch the signal strength as you point the gun at all four corners.if its black anytime while pointing it on screen,you need to move back.you gotta find the sweet spot with these 3 variables,distance from screen,height of screen,and height of gun. |
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