Step 3Grooves
iImage Information

This is where the table saw does the heavy lifting, in cutting the groove in the frame pieces. In setting up the table saw for this cut, it helps to have a 1/4" drill bit for setting the blade height and fence. You want the height of the blade to be just a little bit over 1/4", just to compensate for any waviness in cutting the tileboard to size. While for the fence, try to set the fence as close to a 1/4" from the right side of the blade to the fence. My thinking behind setting the fence a 1/4" is that I only want a small reveal on the front side, while trying to keep it as professional looking as possible.
The kerf on my rip blade is a 1/8" and the tileboard is 1/8" so it should be a nice and snug fit.
After cutting all the groves in the frame members. Sand them all down, and try to knock down all the corners slightly. Just to prevent splinters.