Mark out the desired position of the domino and work using the viewing window. Route into both parts of the workpiece at the maximum routing depth (70 mm each) with the 14 mm router. In the end grain, set both routed mortises with the correct mortise width – in this case the dominos are later glued and then fit in precisely. The routing height is half of the workpiece thickness (which is 40 mm in this example, so the routing height setting is 20 mm).
In the lengthwise rail, set the routed mortises with a 70 mm routing depth as well, but route the first mortise with precision and the second as a slot with clearance. Proceed likewise for the additional lengthwise and crosswise rails.
Then cut the dominos to fit the ready-made mortises. In this example, the nominal domino length is 115 mm, which is calculated by doubling the routing depth of 70 mm = 140 mm and subtracting the pinned joint of 25 mm = 115 mm. Cut the domino a few millimeters shorter (so that later the glue has enough space), down to 112 mm. Chamfer the cut domino at the edges using a sanding block.
Then drive the dominos all the way into the routed mortises in the end grain, adding glue to the joint. Join the lengthwise and crosswise rails using fastening clamps and glue the joint.
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