The Last Joinery on the Anna Rocker

The two side frames are now complete. Now comes the last joinery step of routing the three spline slots in each of the 6 miter joints. This is done on the Multi Router of course. The machine table has a center line that I use to line up the joint. I marked the first joint for the slot locations, then set the two stops on the z axis for the two outside slots. I machined these first two, then reset the height for the center. The results were good.

I unclamped the assembly and continued on with the other joints. Next I milled a piece of ash to fit the slots. I inserted the piece, then traced the shape. I cut out three of these triangles right next to each other. The result is grain that lines up across the three splines. These are cut so the long grain spans the two halves of the miter, making a strong reinforced joint. 

With all the splines glued in, I'll be flushing them up and continuing on with the shaping of the two assemblies. I also need to make a bent, laminated plywood shell for the back upholstery panel. This is a change from the prototype, but it will be a better chair. That's why we build prototypes, right?