Box Joint Jig

[Jon McFadden]

Here is the Box Joint Jig I use. It's much more precise than the miter gauge type.
http://nordykebeefarm.com/forum/forum_posts.asp?TID=18&PN=1&TPN=1

[BigRog]

Just from those pics I can't see how it works

[Jon McFadden]

The picture shows a standard blade in the arbor. That was a mistake when I took the picture. Normally there is a dado blade set for 3/4" on the arbor. I also added a drawing. Instructions will follow.
Does that help?

[Jerrymac]

That looks about like this;

http://beemaster.com/beebbs/viewtopic.php?t=1525

[Jon McFadden]

Jerry,
Your referenced link shows the old standard miter gauge box joint fixture.
First, everytime you replace it on the miter gauge, you need to recalibrate it. The one I made doesn't require anything except dropping it into the guides, raising the dado head to the correct height and making your joints.
The other thing that the standard miter gauge fixture won't do is a 3/8" dado for the first notch on the sides so you can have a full length rabbet. Much stronger. You'll notice on the plans that the indexing pins are 3/8" high. If the pin on the miter gauge jig were modified to 3/8" instead of 3/4", then you could do this on it, too.
I've used the type of jig you referenced for years. Trust me, if you ever use the sled type, you'll never go back to the miter gauge style.
Jon