![]() Use the joiner in the vertical position as shown to cut the slots, with the base of the joiner against the temporary fence - this will produce slots in the same relative position as the shelf itself. An additional mark needs to be made along the entire face of the shelving side board where the shelf will be placed, and a 2X4 or other thicker piece of lumber clamped there to provide a fence for the biscuit joiner to ride on. To cut the biscuit slots in the center of a larger board, as in the side of a shelving unit, position the two pieces where they are to go and mark both pieces.It is much easier to sand down the projection after gluing rather than sand the entire horizontal piece. Although not shown, a good idea is to place a piece of sandpaper under the biscuit joiner to very slightly raise the joiner this is done so the the vertical piece will very slightly project past the horizontal piece.A 2X4 has been clamped to the workbench surface as a guide to hold the vertical board while using the biscuit joiner. The slots in the edge of the board are cut the same as for edge gluing, while the slots in the vertical piece are cut while holding the board vertical. Position the boards as they will be in the finished product and again mark the locations of the biscuits. In the first photo below, two boards are to be joined at right angles.Such joints might include joining the sides of a drawer to each other or joining a small shelf to the surface of the shelving side piece. Joining the edge of one board to the face of another is another common joint in woodworking. A few thousandths of an inch should be all that needs sanding off. The biscuit cutter, if used correctly, will cut the slots for the biscuits at precisely the right depth in each board. After the glue has dried, some sanding will likely be necessary to make the surfaces of the boards line up completely smooth, but it should be very minimal.If too many boards are to be joined together, it may be necessary to only glue a few at a time in order that the glue not set up too much while getting all of the boards together before clamping. Press the other board onto the biscuits and clamp the assembly until dry. Again, it is not necessary to get them into the exact center just center them by eye and it will be good enough. Insert the biscuits into all the slots cut into one board, centering them in the slots. The edge of one board of each joint should also have glue along its entire length. Add glue to the slots cut for the biscuits, making sure that each slot is filled to about 1/4 of its depth with glue. Repeat for each line drawn on each board. ![]() This will cut the slot that the biscuit will fit into. With the side of the board with the line drawn on it facing up, position the biscuit joiner at the edge of the board, turn the tool on, and firmly push the blade into the wood. It is not necessary to have the exact center, but get it as close as possible. ![]() Set the fence so that the blade will project into the center of the board. ![]() Other types of joints may require smaller biscuits so that they don't protrude beyond the back surface of the board. This is the largest of the biscuits available and will extend further into each board. Choose a size of biscuit a #20 is normally used for edge gluing. You should probably have a small supply of each size available, as most jobs will contain many different types of joints to be made. There are three sizes of biscuits to choose from #0, #10 and #20.For ¾" lumber, a biscuit every 12" or so is adequate, while with 2X lumber a biscuit every 18" or so will do fine. If many boards are to be joined, it is easiest to use a straight edge and mark them all at the same time with a light pencil line running across the entire surface. Mark the locations of the biscuits on both boards.Boards should be smooth, requiring only a light sanding before finishing, with the edges to be joined together as straight as possible. To accomplish this joint, lay the boards on a smooth surface in the orientation and position desired for the final assembly.
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