One of the most simple and useful things I have made in my shop so far is this crosscutting jig. It is perfect for when your chop saw just doesn’t reach far enough to cut a big piece of wood. Also, I have much nicer blades for my table saw then I do for my chop saw. Either way, it is a quintessential jig to have in your shop.
I made this one with some scrap wood I had lying around the shop in a matter of an hour or so. The base is made from birch veneered plywood and the rails are made from oak. I bought the T-tracks to guide the sled from Rockler, my new favorite store. Other than that, there’s not much to it. I decided to use dowels to hold it all together but screws or any other type of joinery would work just as well.
The most important part is getting it square obviously. What I did was made the base perfectly square, measured the distance between the tracks on my saw, then attached the tracks to the sled. Then I clamped the jig the saw, turned on the blade and raised it up through the wood. Now with my T-square I am able to line up the pieces that hold the wood perpendicular to the blade. Thats all there is to it. This design is very simple and straightforward but if you browse around the web you will find all sort of different designs, additions, and safety additions.
(More pictures can be found in this Flickr set)