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J. Clarke J. Clarke is offline
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Default Leigh D4 dovetail jig driving me nuts

charlieb wrote:
J. Clarke wrote:

charlieb wrote:
Since the MultiRouter was brought up as an alternative to
the Leigh, PC and the AKEDA, you might consider another
alternative - which eliminates the centering of the bit and
the roundness of the guide collar - the JoinTech Cabinet
Maker precision positionable router fence

snip
And unlike its competitor
it has a built in centering feature - eyeballing being one
of the problems with the competitor.


Eyeballing? One can measure you know.


Sure, you can measure, find and mark the center of the board
- that's not the problem. It's the aligning that center of
of the board mark with the center of the router bit that's
the problem. Few, if any, dovetail router bits have a convenient
center mark to align to.


Which is why the Incra has a centering scale.

If you looked at the photo of the sample DT with the gap problem.
you'd notice that either the pins part or the tails part is off by
a noticeable amount so that the pins part's top edge sits proud
of the top of the tails part - the two parts being of identical
width.
THAT indicates the pins or tails or both are not centered on the
parts width.

My Oh Bull**** alarm goes off whenever I see ANY machine dovetail
making tool claim "fool proof" and/or "no test cuts necessary".
It's getting the damn bit heights right that raises all the hell -
and
takes so much time to get right. And when you have to use TWO
bits to make the DT joint - you'e going to lose one set up to get
the other - unless you're using TWO routers - which you can do with
a JIG but not with a router table and fence system.