Ryobi JM82 Operator's Manual page 16

T- JOINTS
See Figure 13.
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.
n Unplug the biscuit joiner.
n Place the two pieces of wood to be joined on a level
workbench. The inside face of the vertical board should
be facing up.
n 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.
n Plug the biscuit joiner into the power supply and cut slots
in all boards that require end slots.
Follow the procedures explained in "Edge-To-Edge
Joints."
n Set the fence angle at 90°
n Set the fence height at the desired dimension on the
scale.
n Select the correct depth of cut setting for the biscuit size
you plan to use.
n 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.
OPERATION
BISCUIT SLOT(S)
HORIZONTAL
BOARD
TO CUT ENDS SLOTS IN HORIZONTAL BOARD
HORIZONTAL
16
T-JOINT
VERTICAL BOARD
BISCUIT SLOTS/
CENTERLINE
MARKS
BOARD
CLAMP
CENTERLINE
MARK(S)
BISCUIT(S)
Fig. 13
BOARD
CENTERLINES
Fig. 14
Fig. 15