"sal" wrote in message
Thanks for the input guys, very useful info quite a range of ideas.
I have several jigs I built for ripping ply. I start with a piece of
hardboard about 14 inches wide and 8 feet long. I then rip a piece of 1/2"
ply about 4" wide, keeping one factory edge, and ripping it very carefully
in a table saw, so both sides of it are very straight.
Measuring the distance between the edge of a circular saws shoe and the
blade, I add about 1/4" and place the 1/2' ply onto the 1/4" hardboard the
above distance from the edge with glue and staples. Clamp the jig on
something and run the saw down the edge, and it will cut off the extra 1/4"
so you then have the edge of the hardboard that is exactly where you will
later cut plywood. Makes it easy to put the cut exactly on the line you
measure on your ply.
On the other side of the jig from where the saw rides, I do the same thing,
but I make it a little wider than the distance from a 3/4" router bit to the
other side of the 1/2" straight plywood fence.
I now have one jig that works for cutting a dado or rabit, with quick use
with no need to add measurements to the desired size to account for the size
of the saw or router shoe. If you want different size for different router
bit, make them, too. I have a stack hanging on a shelf bracket on the wall.
I also have 4 foot versions, and 2 foot versions.
If you have never done this, give it a try. It is hard to imagine anything
easier to use or as accurate for a tenth of the price.
-- Jim in NC