Craftsman 315175502 OPERATOR'S MANUAL

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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.

FLATMITERJOINTS

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.

EDGEMITERJOINTS

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.