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MITER JOINTS
See Figures 20-22.
There are two types of miter joints that can be made using
biscuits: flat miters and edge miters. Flat miters are used
when making picture frames. Edge miters are used when
making boxes or things where you don't want to show the
end grain of the wood. Butt joints show the end grain in
wood.
MAKING
FLAT MITER JOINTS
•
Unplug the tool.
•
Place the pieces of wood to be joined on a level work-
bench.
•
Using a combination
square, draw a line through
the center of each joint perpendicular
to the mitered
edges.
FLATMITER JOINTS
CENTERLINE
MARK(S)
BISCUIT
Fig. 20
•
Set the fence angle at 90 °. Set the fence height at the
desired dimension on the scale.
•
Select the correct depth of cut setting for the biscuit
size you plan to use.
•
Clamp the workpiece securely.
•
Align the indicator mark on the fence with the center-
line on the workpiece.
•
Plug the tool into the power supply and prepare to cut
the slot.
•
Depress the switch trigger and let the motor build to its
maximum speed, then gradually push the biscuit joiner
forward to extend the blade into the wood.
•
When the base assembly bottoms out against the
depth of cut adjustment knob setting, pull back, releas-
ing pressure on the spring. The blade will retract from
the biscuit slot.
•
Repeat this procedure for cutting mating slot and all
required miter joint slots.
•
Once all slots have been cut, place a biscuit in each
joint and dry-assemble the workpieces.
Make sure
each joint lines up and fits.
•
Disassemble the workpieces and place a bead of glue
in each slot. Spread a bead of glue over the entire
surface of the joint. Reinsert the biscuits and assemble
the workpieces.
•
Clamp workpieces together until the glue sets.
MAKING
EDGE MITER JOINTS
•
Unplug the tool.
•
Place the pieces of wood to be joined on a level work-
bench.
•
Mark the centerline of the joint on each board.
EDGEMITER JOINTS
CENTERLINE
MARK(S)
BISCUIT
Fig. 21
•
When making edge miter joints with workpieces that
have different thicknesses, clamp them securely to a
workbench
with the long sides up. This will assure that
the outside surfaces match.
•
Set the fence angle at 45 °.
•
Slide the fence up or down until the fence height is at
desired setting.
•
Tighten the height adjustment knobs securely.
•
Place the biscuit joiner on the workpiece with the
fence resting on the long side of the workpiece. The
front base should be against the mitered edge of the
workpiece.
•
Recheck the fence height setting to make sure it will
not cut through the workpiece.
•
Align the indicator mark on the fence with the cen-
terline on the workpiece.
Make sure the front base is
pressed flat against the mitered edge of the workpiece.
•
Plug the tool into the power supply and prepare to cut
the slot.
•
Depress the switch trigger and let the motor build to its
maximum speed, then gradually push the biscuit joiner
forward to extend the blade into the wood.
18
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