1,044
edits
Changes
→Projection/Touch Surface: added numbers for edging
[[Image:EdgeSideView.png|200px|thumb|right|Edge view schematic of the edge for measurement]]
[[Image:EdgeSideView.png|200px|thumb|right|Edge view schematic of the edge for measurement]]
The touch surface consists of a rectangular sheet of 3/8" plexiglas or acrylic, with a touch-compliant surface laid on top.
Start off with a 4:3 aspect ratio so we can use a regular XVGA projector (1028x768).
Start off with a 4:3 aspect ratio so we can use a regular XVGA projector (1028x768).
In order to rest inside a "deep" aluminum channel that also holds the LED strips, we need to add a 0.5" edge to the plexiglas top.
A larger table would have a projection area of 48" x 36".
In order to adhere the compliant surface to the plexiglas top , we need a margin of 1" (e.g. for attaching with a strip of double-sided tape?). (One inch may be too much, but we can always trim the surface down.
Thus, the horizontal and vertical dimensions of the plexigas must be extended by 2 x (1.5") = 3" to accomodate the aluminum channel and margin.
A small table would have a projection area of 32" x 24", laid on a 35" x 27" plexiglas top.
A larger table would have a projection area of 48" x 36", laid on a 51" x 39" plexiglas top.
A long informative thread on the use of [http://nuigroup.com/forums/viewthread/2197/P15/ silicone coated vellum] as a touch-compliant surface.
A long informative thread on the use of [http://nuigroup.com/forums/viewthread/2197/P15/ silicone coated vellum] as a touch-compliant surface.
=Table Frame Design=
=Table Frame Design=