To cut a taper in a large panel, I always turned to my portable circular saw and a clamped-on guide. But that clumsy set-up rarely yielded the cut quality or accuracy I wanted.

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To cut a taper in a large panel, I always turned to my portable circular saw and a clamped-on guide. But that clumsy set-up rarely yielded the cut quality or accuracy I wanted. So instead, I designed and built this panel tapering jig for use on a tablesaw.

Adjust the two arms by tightening or loosening the 14 "-20 star knobs that hold them in place, and remount them in different holes if necessary. A 1" length of 38 " dowel mounted to the jig's rear corner (where shown) backs and supports the workpiece, and 220- to 320-grit sandpaper on the face of the jig near the blade prevents the workpiece from shifting during a cut. Drill a grid of 14 " holes in the jig's base so the jig's arms can be moved to fit a range of workpiece sizes.

To use the jig, first lay out the taper on your workpiece. Align the layout line with the blade, butting the workpiece against the 38 " dowel, adjust the jig's arms to support the workpiece, and make the cut.
—Serge Duclos, Delson, Que.