Ryobi JM82G - Manual (Page 10)

10 − English
OPERATION
BUTT JOINTS
A butt joint is made by mating the end grain of one board
with the edge grain of another. The bonding of glue on this
type of surface is poor. However, by using biscuits you can
create a strong joint that gives a mortise-and-tenon effect.
MAKING BUTT JOINTS
See Figures 11 - 12, pages 18 - 19.

Unplug the biscuit joiner.
 Place the two pieces of wood to be joined on a level work-
bench. Align them against each other in the arrangement
in which they will be assembled.
 Using a square, determine the location of each biscuit
spline joint and mark the center of each joint by drawing
a line across the edges of the two boards.
 Loosen the locking knob and set the fence angle at 90°.
 Set the fence height at the desired dimension on the scale
by rotating the height adjustment knob.
NOTE: The scale indicates the height of the fence from
the center of the blade.
 Tighten the locking knob securely.
 Select the correct depth of cut setting to match the biscuit
size you are planning to use. Make a test cut in a scrap
piece of wood from the same workpiece if possible.
 Clamp the workpiece securely so that it will not move
during the cut.
 Plug the biscuit joiner into a power supply and prepare
to make your first cut. Grasp and hold the biscuit joiner
securely with both hands.
 Place the fence against the board and align the indica-
tor marks on the fence with the centerline mark(s) on the
board.
 Depress the switch trigger to turn on the biscuit joiner,
then push it forward to extend the blade into the wood.
 When the base assembly bottoms out against the depth
of cut adjustment knob setting, pull back to release pres-
sure on the spring. The blade will retract from the biscuit
slot.
 Repeat this procedure for cutting the slot in the mating
workpiece.
 Once all biscuit slots have been cut, place a biscuit in
each joint and dry-assemble the workpieces. Make sure
each joint lines up and fits.
 Finally, disassemble the workpieces and place a bead
of glue in each slot. Also, spread a bead of glue over the
entire surface of the joint. Reinsert the biscuits and as-
semble the workpieces as shown in figure 10.
 Clamp the workpieces together until the glue sets up.
OFFSET BUTT JOINTS
See Figure 12, page 19.
The rails of a table or workbench are often offset from the
front of the table legs. When offsets are required, it is neces-
sary to cut the slots in the rails first, then readjust the fence
to cut the slots in the legs.
Keeping this one exception in mind, the procedure for cut-
ting offset butt joints is identical to the procedure for cutting
butt joints.
For example, if a 1/4 in. offset is desired, you would mark
the centerlines for cutting a butt joint as mentioned in the
procedures for cutting butt joints, and cut the slots in the
ends of the rails. Next you would raise the fence 1/4 in. to
the desired offset and cut the slots in the legs.
T- JOINTS
See Figure 13, page 19.
A T-joint is used when the end of a board is joined to the face
of another board as shown in figure 12. Attaching shelves to
bookcases and inner support braces to frames are typical
applications. Actual cutting of a T-joint is as simple as any
other cut. However, it is critical that you mark the centerlines,
mark the intersection points for each slot, and cut each slot
correctly.
MAKING T- JOINTS
See Figures 14 - 15, page 19.

Unplug the biscuit joiner.
 Place the two pieces of wood to be joined on a level
workbench. The inside face of the vertical board should
be facing up.
 Determine the location of each biscuit joint and mark
the centerlines on each board. The centerlines for both
boards must line up with each other. Measure carefully;
these measurements must be accurate and precise.
NOTE: Measure twice and cut once. In addition to the
centerlines lining up, the spacing of the biscuit slots from
side-to-side must also match.
 Plug the biscuit joiner into the power supply, grasp and
hold the biscuit joiner securely with both hands, and cut
slots in all boards that require end slots.
Follow the procedures explained in Edge-To-Edge Joints.
 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, then cut each slot at the
marked centerline intersection.
Next, you must adjust the fence on the biscuit joiner in order
to cut slots into the face of the vertical board.