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RTJ400 User Guide
Chapter 13
Box Joint Procedures - 3/32"
13-19 Now that your joint tightness has been determined, with
the frame pin in position 1, re-clamp pin board 1. Rout in and
out of each template opening.
The eBush must touch one side
of the opening as you enter and the other side as you exit.
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13-14 Adjust the bit until the tip is level with the center of
the pencil line on pin board 1
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. Double check that the
bit still rotates freely.
IMPORTANT: Bit height determines the
flushness of the joint, so set your bit properly the first time.
Adjustments for flushness are at the end of the chapter.
13-15 Quick Fit Test To save time and wood, clamp the two
approx. " thick scrap
test
boards in the jig, back to back
A
.
Review the remaining steps in this Chapter.
Rout both
boards in all four frame pin positions 1, 3, 2 and 4. Join the
routed boards and make the joint fit adjustments in the next three
steps. Don’t worry about board edge alignment, the test is for
joint fit only.
TOO LOOSE TIGHTEN
TOO TIGHT LOOSEN
13-18
On the eBushes above, record the settings you used to
achieve perfect joint fit. The first eBush is an example of how to
record your setting.
13-16 Joint Fit Adjustment Join the boards, keeping the
same side board edges together. If the joint is too loose, turn the
eBush to a higher number, as shown in the next step. If too tight,
turn the eBush to a lower number.
13-17
Each increment on the eBush changes the joint glue line
fit by 0.002" [0.05mm]. Half an increment, a mere 1000th inch!
Re-tighten the eBush nut after each guide bushing adjustment.
Sample
Leigh 163 Bit
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