Ryobi JM81-1, Operator'S Manual

Page: 13 / 22

Page 13
T- JOINTS
See Figures 11-15.
A T-joint is used when the end of a board is joined to the
face of another board as shown in figure 11. 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.
See Figure 11.
HOW TO MAKE T- JOINTS
Unplug your plate joiner.
Place the two pieces of wood to be joined on a level
workbench as shown in figure 12. 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 as shown. The centerlines for
both boards must line-up with each other. Measure
carefully, these measurements must be accurate and
precise.
TIP: 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 your plate joiner into power supply and cut slots in
all boards that require end slots.
See Figure 13. Follow
procedures explained in "Edge-To-Edge Joints" . Set
fence angle at 90 ° , set fence height at desired dimension
on the scale, select the correct depth of cut setting for the
biscuit size you plan to use, clamp workpiece securely,
then cut each slot at the marked centerline intersection.
Next, you must adjust the fence on your plate joiner in
order to cut slots into the face of the vertical board.
TO ADJUST FENCE:
Unplug your plate joiner.
Loosen height adjusting knobs and set fence angle at 0 ° ,
set fence height at desired dimension on the scale then
retighten height adjustment knobs securely.
See Figure
14. Next, select the correct depth of cut setting for the
biscuit size you plan to use, clamp workpiece securely,
and cut each slot at the marked centerline intersection.
OPERATION
OFFSET BUTT JOINTS
See Figure 10.
The rails of a table or workbench are often offset from the
front of the table legs. When offsets are required, it is
necessary to cut the slots in the rails first, then re-adjust the
fence to cut the slots in the legs.
Keeping this one exception in mind, the procedure for cutting
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.
BISCUIT (S)
BISCUIT SLOT (S)
CENTERLINE
MARK (S)
BISCUIT SLOTS CENTERLINE MARK (S)
HORIZONTAL BOARD
BOARD CENTERLINES
HORIZONTAL BOARD
CLAMP
VERTICAL BOARD
TO CUT END SLOTS IN
HORIZONTAL BOARD
T-JOINT
Fig. 13
Fig. 11
Fig. 12