Leigh R9 PLUS - The Leigh e-Bush Guide Bushing; Joint Fit Adjustment Mechanism; e-Bush Initial Setup and Usage

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Joint Fit Adjustment
R9PLUS BENCH OPERATION
CHAPTER 5
The Leigh e-Bush
Note: Normal tolerances with bits, guide bushings and router runout will generally produce poor fitting joints. The Leigh
e10 elliptical guide bushing solves this problem.
5-2 With the e-Bush turned to “10”

in the base the active
“diameter” is increased, allowing less side-to-side movement,
resulting in smaller sockets and larger pins. Turning the e-Bush
to “0”

allows more side-to-side router/bit movement and more
wood removal, producing larger sockets and smaller pins, and
thus a looser fit.
5-1 The Leigh e-Bush barrel is elliptical

, unlike plain
circular template guidebushes

. When rotated, the effective
diameter of the barrel changes, allowing fit adjustments as small
as .001"[0.025mm]. The e10 e-Bush is included with the R9PLUS.
5-4 All settings for the e-Bush will be aligned to the scratch or
ink marks on the router. The e-Bush will always be set on index
mark 5 as a starting point for dovetails and box joints.
5-3 Make a small scratch line or permanent ink mark on the
router baseplate

or guidebush adaptor at the 12 o’clock and
6 o’clock position. This will help you steer the template along
and between the guide surfaces.