To help clamping
go smoothly when edge-joining boards, we devised an edge-gluing fixture (shown
below) that directs clamping pressure to the center of the workpieces. If
the clamping pressure is not centered, it can result in "overpull" or "underpull,"
which cups the panel. You'll need two of these handy fixtures, one for each
clamp-bearing edge. As an additional advantage, this fixture elevates the clamps
off the panel surface, making it easier to clean up glue squeeze-out. We also
made some 3" lengths of the fixture to align the individual boards. You'll need
two of these for each joint.
