Porter-Cable OMNIJIG 55160 Instruction Manual page 28

ITEMS NEEDED
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With the OMNIJIG , through dovetail joints are made by first cutting
the tailboard (A) Fig. D1 using a dovetail bit. The pinboard (B) is cut
next using a straight bit.
You will need:
* variable finger template (miniature or standard)
* straight bit and dovetail bit
* template guide and stops.
Noting your wood thickness, see your "Dovetail Setup Guide" for
specific router bits, template guides and stops needed. Instructions
for using the guide can be found in the "BASIC OPERATIONS"
chapter.
The variable finger template comes standard with the 24" OMNIJIG
and it is available as an accessory for the 16" OMNIJIG
Be sure to install the appropriate router bit depth gauge at (C) Fig.
D2.
When attaching these depth gauges (C), the top screw should be
tightened, followed by the bottom screw (in this order) so that the
gauge is firmly in place on the side of the base. While the screws
are being tightened it is important to note that the gauge will locate
itself correctly on the base so long as NO PRESSURE is applied to it.
Applying pressure to the gauge while tightening the screws is likely
to cause its intended location to be mis-aligned. This could result in
router bit depths being set incorrectly.
SETTING UP
AND MAKING THE CUT
NOTE: Use the red on-board labels ("A Pins" and "A Tails") on the
variable finger template for a guide as you follow these instructions.
The instructions are for both the regular size and miniature variable
finger templates, except where noted.
NOTE: For the miniature variable fingers, the fingers shown at (D)
Fig. D3 are the proper fingers for doing through dovetails.
SPECIAL INSTRUCTIONS FOR USING D6 ROUTER BIT
When using the D6 dovetail bit, the OMNIJIG
through dovetails in wood up to 1-1/2" thick. However, there are a
few items that are unique to this:
1. There is a minimum wood thickness of 3/4" when using the D6
dovetail bit.
2. The variable finger pairs must be set up to have a minimum 1/8"
gap (X) between them as shown in Fig. D4.
3. When cutting the tails, the bulk of the material must first be
cleaned out using the S2 straight bit and the G1 template guide.
Set the depth of cut of the S2 straight bit to be slightly shallower
than the depth of cut of the D6 dovetail bit.
NOTE: You might find it desirable to make multiple passes of the S2
straight bit with increasing depths of cut in order to reduce the
vibration on the S2 straight bit.
A
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,
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.
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can be used to create
B
Fig. D1
Use these fingers for the miniature through dovetails
D
Fig. D3
X
Fig. D4
C
Fig. D2