Wood Preparation
D4R Pro - CHAPTER 6
"Garbage In - Garbage Out"...
This adage of the computer age stands equally true for dovetail jigs.
6-1 It is vital for accurately aligned joints that stock used on the
Leigh jig must be prepared straight, flat, of even thickness and equal
widths, with square ends and edges. Note that plywood is generally
unsuitable for routing because of tearout problems.
90°
90°
6-2 You will want to test the jig, so prepare some
3
⁄4" x
5
1
⁄2"[20x140mm] boards. Cut them to length as you need them
for the jig tests you want to perform. Use them for practice with
the jig’s various joint modes so you can see how the different
modes work. Remember, though, that two boards of different
thicknesses can be joined just as easily.
90°
6-3
Dovetail joints are intended for joining end-grain
to end-grain
➀
. Attempting to cut dovetails in side-
grain
➁
does not work because:
A. The wood will tear out badly when routing.
B. Even if you could rout them, the pins and tails would easily
break off across the short grain
➂
, either during or soon after
the assembly when the boards start expanding or contracting
at different rates.
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1
2
3
15
The online video will reduce your learning time
dramatically!
Stream to your smart phone or tablet to use in
your shop as a visual reference. Find the video in the Instructional
Videos section of the Support menu at leighjigs.com.
Watch the Online Instructional Video
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