Step 2: Attach the IR frame to the acrylic sheet
Remove the protective sheet from one side of the acrylic sheet and place it on a large flat surface with the exposed side facing up.
Next, assemble the IR frame and attach the thicker double-sided tape to the back along all sides. Do not remove the backing layer from the tape yet!
With the backing still on the tape, place the IR frame on the acrylic sheet with the tape facing down. At this point you can double check the positioning and orientation of the frame. The easiest way to do so is to connect the frame to a laptop and open a drawing application. You can use the FUN!box drawing tool or any other whiteboard app. You don’t have to use a drawing tool, but it will be easier to visualize the mouse movements.
To test the orientation, touch the acrylic inside the top left corner of the IR frame. If the line appears in the wrong place on the screen of the computer, double check the orientation. Once you know it’s properly oriented, align the bottom of the IR frame with the bottom of the acrylic sheet. (There should be about 2-3cm of excess acrylic, and it should be above the top of the IR frame.
Finally, with the frame in the correct position, remove the backing of the double-sided tape on the side of the frame at the top right corner and pull it out while lightly applying pressure to the top of the frame to keep it flat. Next, remove the backing on the bottom side on the bottom right corner and repeat. Finally, remove the backing at the top right corner of both the top and right side. Then attach each side, one at a time.