|
Project
4
|
|
Picture frame with a single half
blind
dovetail joint
 
This procedure is very similar to project 3 and can be referred to
clarify the foregoing.
In order to get the exact lengths, crosscut a single piece wide enough
to accommodate two equal width pieces.
Now rip 2 equal width workpieces on the table saw. For a square frame
crosscut a piece wide enough for four workpieces
Repeat this in order to obtain the other two if making a rectangular
picture frame.
They need not necessarily need to be square in cross section.
Illustration
30 - In order to assist in accurate and square marking, the
four dovetail “tenons” are rebated to their entire length of the
intended dovetail. They are approximately 3/4 the width of the
adjoining workpiece.
Marking the dovetail and shoulder
Using the rebate as the shoulder, measure and mark all around the ends
of the dovetail workpieces. |
Setting
up and cutting the shoulders & dovetails
Illustration 31 -
Clamp the supporting jig as shown in the vice. note of the steel rule
sandwiched between the AngleMag and the support jig. This is a
“vertical
stop” that will result in identical sized dovetail tenons and leave the
dovetail in the exact centre of the workpiece.
Clamp the workpiece vertically to the supporting jig so that it is
touching the steel rule height stop. Don’t push it hard against the
rule. Now clamp.
Secure the AngleMag so that the saw glide is over the workpiece and
select the angle on the angle selector. Once you have lined up the saw
for the
very first cut and made this cut down to the shoulder line….do not move
the AngleMag or disturb the shaft or angle selector.
Simply release the workpiece and flip it around, re-clamp gently
pushing up against the steel rule.
Your saw blade will now cut a dovetail tenon to leave it in the centre
of the workpiece. Cut both ends of both opposing sides of the frame.
  
|
Cutting
the shoulders
Refer to illustrations 1 & 11 - alternatively cut the
shoulders first.
Illustration 32 - Cut
the shoulders as shown and regain the angle for the dovetail sockets.
    
Illustration 33 - Clean
up all internal corners.
  |
Illustration
34 - Assemble all four adjoining workpieces on a flat surface
and clamp ensuring they are all square.
Carefully trace the dovetail mark with a marking knife.
     |
Illustration
35 - With a marking gauge transfer the depth mark onto the
adjoining pieces.
 |
Setting
up & cutting the dovetail socket
Illustration 36 - Set
up the workpiece vertically as
shown. These cuts are now confined to the length mark on the top and
the
depth mark below. The result is that only half the waste amount is cut
with
the saw. The rest is now chiseled out.
Note the packing placed horizontally. This effectively raises the saw
glide away from possible damage from the saw teeth. Since the saw blade
will be angled up, the teeth may damage the saw glide.
Cut down to the depth marks, release the shaft; rotate it 180 degrees
and cut the other side. Refer to illustration no. 9 for precision
placement
of matching cuts.
Clean up all internal corners and fit.
  
|
|
|
|
|
|
