Hi Harry, this is my spline jig. Took a little trouble with it so I could do more than picture frames, although that's what it's used for most of the time. The width lets me put splines on boxes, for example. The backing support is runs on a T-track so it can be locked down in any position. And it was fun to make, very precise. Here are a few pictures. Third picture is before putting the second angled support piece in place.
Construction was fairly straightforward. The base is a simple block of 3/4 ply with two runners laid underneath and aligned to the blade/miter slots. The cradle was cut from one piece at a 45 degree angle, so when glued down formed a 90 degree angle. Similar cut formed the two vertical supports. Used a Rockler heavy duty triangle to set everything square and the 90s perfect. I cut splines with a glue line, full kerf saw, which also makes a flat bottom cut, exactly 1/8th, so I can do multiple passes if I want wider splines. Moving the back over by the thickness a bar set against the blade gives precise results.
The backing piece is made of 1/2 inch BB ply. Took about 4 hours to make from T-track, a 5/16th Tnut and star knob. If you look closely at the third picture, you'll see that the back, taller vertical support is right behind the T-track, show how I used the screws that holds the T-track also connect the vertical to the diagonal piece.
It was a lot of fun to make and I use it often. No plan, off the top of my head.
The more I do, the less I accomplish.
Last edited by DesertRatTom; 10-02-2019 at 11:44 AM.