Leigh Super12 - Testing Joint Fit and Adjusting Tail Width; e7-Bush Adjustment for Sliding Dovetails

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SLIDING DOVETAILS
Chapter 13Super Jig-12-18-24 User Guide
13-19 Test the joint for fit. The tail should be too big. If it is
too small, adjust the finger assembly outward by at least half the
difference and rout another test tail on the other end of this test
board.
13-20 If the tail is too wide

move the finger assembly in
toward the jig by half the amount the tail is too wide

. Rout the
same test board again. Adjust and re-test until fit is slightly loose
or slightly tight.
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13-21 Note: the e7-Bush fit adjustment for sliding dovetails
works reverse to normal. Fit adjustments are made by adjust-
ing the tail size only, not the socket. The e7-Bush is turned down
to a lower number for a tighter fit, and up to a higher num-
ber for a looser fit. Each increment changes the glue line fit by
0.001”[0,025mm] When the fit is satisfactory, rout one end of a
project tail board and test again. If the fit is good, rout all tail board ends.
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13-22 Stopped Sliding Dovetails
If a stopped sliding dovetail is called for...
Measure from the outside tip of the dovetail bit to the edge of
the router base.
13-23 Measure the same distance from where you want the slot
stopped to a position on the finger assembly. Move a guidefinger
to that point and mark the guidefinger with a felt pen as a visual
router stop mark…
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13-24 Or lightly clamp (with a soft-jawed clamp) a short board
to the finger assembly to act as a router stop.