|Project by billT||posted 04-05-2009 06:12 PM||19180 views||95 times favorited||19 comments|
My poor technique with a single-edged saw guide resulted in many wavy cuts, which led me to develop an improved double-edger.
Admittedly, the concept comes from the Festool saw, but for far less $$.
Basically, the saw is guided between two rails, and rides on a thin hardboard panel that acts as a zero-clearance cut guide.
The overall length is about 54” to allow cross-cutting 48” stock.
Making the end supports at least 2-1/4” thick allows you to cut two thicknesses of plywood at once.
Use with a sacrificial board beneath, and the cuts are superb with zero tearout (40T thin kerf blade).
The guide can be used without clamping – just line up and cut.
And, you do not have to disable the saw’s blade guard!
I have had good results using just the fence for rough cuts – close to 1/16” over 48”.
For more accurate cuts, I use a steel square to mark a pencil line to square up the end of a sheet, and then measure in from both ends and align marks to one edge of the kerf.
The guide can be used to cut on either side of the kerf – just have to keep this in mind when lining it up.
I have a shorter version also which is really handy for crosscutting narrow stock.
This one has a thicker fence so that I can even use it to cut 2×4s.
For multiple cuts of the same size, I clamp a thin strip of hardboard to the fence and then measure and place a binder clip which acts as a stop.
Lots of alternative uses come to mind, for instance: – screw a full-length stop to the bottom of the 54 incher to make thin strips or as a repeatable taper jig – adjustable fence for the shortie to do miter cuts – very similar to a jig someone (apologies to the inventor – I will post a link if I can re-find…) posted for a router w/ adjustable width slot used for dado cuts.