Ryobi JM80 - Manual (Page 13)

Page 13
CENTERLINE
MARK(S)
OPERATION
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
1. Unplug your plate joiner.
2. 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.
3. 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.
4. 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.
5. 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:
6. Unplug your plate joiner.
7. 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.
8. Place your plate joiner on vertical board as shown in
figure 15 and align indicator marks on base assembly
with centerline on vertical board.
9. Place a straight piece of wood on the vertical board and
securely clamp it flush against the base assembly. This
piece of wood is used for a fence or guide. It must be
square with the sides of the vertical board and parallel
with the centerline.
10. Align centerline on bottom of base assembly with marked
intersection for biscuit slot.
11. Plug your plate joiner into power supply and prepare to
cut slot.
12. Depress the switch trigger to turn the power on your plate
joiner, then push it down to extend the blade into the wood.
13. When the base assembly bottoms out against the depth
of cut adjustment knob setting, pull back releasing
pressure on the spring. Blade will retract from biscuit slot.
Fig. 11
Fig. 13
Fig. 12
HORIZONTAL BOARD
BISCUIT(S)
T- JOINT
HORIZONTAL BOARD
BISCUIT SLOT(S)
BOARD
CENTERLINES
BISCUIT SLOT
CENTERLINE MARK(S)
CLAMP
TO CUT END SLOTS IN
HORIZONTAL BOARDS
VERTICAL BOARD