This sounds like a moisture problem which could get
worse when using for the intended purpose. Also an end
grain board could be somewhat fragile and prone to breaking.
A few options:
1. Do nothing. Call it a design feature.
2. Make them thicker.
3. Cut them thinner and laminate to a long grain substrate.
4. Breadboard or spline all 4 edges.
I did alternate the grain, the wood was kiln dried and is 2 inches
thick.before cutting the strips they were 4 square.Hard maple,cherry,honey
locust..As soon as I cut them into strips each strip (about 2 1/8 inches
thick) the center rises about a 32 to a 16th of an inch. this seems to be a
pattern on all the woods.
Sounds like it might be a cutting problem. As I understand it, _if_ I
understand it, the rise is along the long grain ([[[[ rise]]]])? You
should be able to run the pieces through the tablesaw again, using the
two-point contact first, and nibble them back to parallel.
If it's along the face grain (----rise----), no problem. Glue will do, so
long as the thickness is right.
I'm not clear from your description as to exactly when/where you are
getting the deformation but dollars to doughnuts it is because the
interior and exterior of the pieces have different moisture contents.
Same thing if you resaw a board...the interior is wetter than the
exterior and the thing will cup after resawing. The answer is...
After cutting, let the wood acclimatize again - it will pretty much
unwarp itself in time. To be sure, cut it a bit oversize so it can be
skinnied down after acclimatizing.
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