Last night I got all my pieces down to 3/8", so this morning I was able to get the final machining done to make my T&G for the back.
First thing to do was to rip the stock into my widths that I will need.
Five pieces at 1 7/8", one at 2" and one at 2 1/4" for each section.
I put my groove in first with just my rip blade in.
Two passes to make sure the groove is centered.
Next I put 1/4" worth of dado blades in and set up with a sacrificial fence.
My grooves were 1/4" deed so we set up to take off just shy of the 1/4".
With the T&G now machined I make a quick trip to the router table to knock 1/16" off the groove side.
Last thing to do is to knock the 1/16" off the tongue side. Router table won't work for this.
For this I have a couple of options.
First is to do all the pieces with a block plane.
If there were just a couple of pieces I would do this but with 24 pieces we will set the table saw up which is my second option.
With my blade tipped over to 45 degrees and just barely protruding we send a couple of test pieces through to get the correct set up.
And after these have gone through I have all my T&G made.
As I am only working with 3/8" stock my width had to be only 1 5/8" wide.
With the narrow width of each board the 1/8" reveal fits in nicely.
Now a little test fit and these 28 pieces will get pre- stained.