You will need two 2” x 4” x 1 meter boards to do this test.
Join one face of each board, then place the two jointed faces together. You should
have a slightly concave joint that produces a small gap between the boards at the
centre of the joint. If you have gaps at each end of the joint, then the cut is convex
and is not acceptable.
What to do if:
The concave cut is too large:
1. Use a dial indicator to measure the height of the knives above the outfeed
table.
2. Keeping the dial indicator in place, use the fine adjustment knob for the
outfeed table to raise the outfeed table (effectively lowering the knives) by
0.025mm (0.001”).
3. Lock the table in this position and perform the test once more.
4. This adjustment can be repeated if the subsequent joint is still too concave,
until the knives are just underneath level (-0.025mm, -0.001”) with the outfeed
table. At this point, the infeed table should be checked for its alignment to the
outfeed table and adjusted as necessary.
The cut is convex:
2. Check that both of the tables do not tilt when locked into position.
3. If these checks prove nothing is out of alignment,
start with the knives at
0.10mm (0.004”) above the outfeed table and make successive test cuts,
each time moving the table up by 0.025mm (0.001”), until a concave cut is
obtained.
Adjustments
Alig nm e nt Lin k
JR06 Joiner Test Cuts
N.B. Always raise the tables to the desired final position and lock into place
1. Check that the tables are parallel to each other using a 2 meter straight
edge.
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