hi all,
i have read all the plogs on making a sled to slide the fresnels and lcd backwards and forwards, dont understand how you can seal everything and still have it move,
as i understand it you are supposed to have a half inch raise off the bottom that goes as far as the lcd for cool air to come in through the slot in the top of the box and goes out through the fans and everything is sealed tight shut after the lcd panel, perhaps i have got it wrong but would appreciate some feed back from anyone who has used this method.
thank's in advance.
Full Version: making the sled
QUOTE (molly @ May 19 2005, 06:21 PM)
hi all,
i have read all the plogs on making a sled to slide the fresnels and lcd backwards and forwards, dont understand how you can seal everything and still have it move,
as i understand it you are supposed to have a half inch raise off the bottom that goes as far as the lcd for cool air to come in through the slot in the top of the box and goes out through the fans and everything is sealed tight shut after the lcd panel, perhaps i have got it wrong but would appreciate some feed back from anyone who has used this method.
thank's in advance.
i have read all the plogs on making a sled to slide the fresnels and lcd backwards and forwards, dont understand how you can seal everything and still have it move,
as i understand it you are supposed to have a half inch raise off the bottom that goes as far as the lcd for cool air to come in through the slot in the top of the box and goes out through the fans and everything is sealed tight shut after the lcd panel, perhaps i have got it wrong but would appreciate some feed back from anyone who has used this method.
thank's in advance.
I've used the sled design and your description sounds good. My sled includes the slot on the top with my top being a two piece (front projection area | light area) which has a gap to allow air into the slot on the sled. My collimating fresnel has approx. 1/2" gap under it. The sled is about 2mm smaller in width than the box itself. Once the sled is positioned, I used duct tape to elliminate air/light leakage between the sled and the box. (not much there anyway) Weather stripping on the top of the sled elliminates air leakage once the covers are closed.
-gs
joe that is a very good looking sled, wish I had that kind of patients and woodworking skills! I just have one thing to say to molly this is the most important part of your projector! take your time or you will break an lcd like I did, well the fcc or what ever they are, this also blocks light on the edges of the lcd from going into the lens causing white light on your wall. there is nothing more important then your lcd being in there stable and sturdy without moving and the security of knowing once it works that you dont have to worry about the fcc's
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