Toller wrote:
I made my first biscuited miter joint last week; with two 15" wide
panels and three biscuits.
It did not come out well; no matter how much I fussed with it I
couldn't eliminate the gap. Possibly no one would have noticed it,
but I sure didn't like it. (it couldn't have been too bad, as it
held my full weight jumping on it...)
So, I am redoing it, being more careful that my cuts are perfect, and
only using two biscuits.

Well, when I dry-fit it, there still a gap I can't get rid of; the
gap is uniform all across, so my cuts are good. I marked up a
biscuit with a central line, and the central line falls exactly on
the edge of the slot. I have thinking that maybe the clamping on
90degree joints is adequate to make it work, but the clamping on
45degree joints won't push them together, and I have to make my slots
a hair deeper.

Does this make any sense, or is my problem likely to be elsewhere?

I am not thrilled about the recutting my slots, as they are likely to
end up a bit wider than I would like; maybe I can get away with just
deepening one side?

Precision flatness of both sides of the wood is the key. ;-)


--
Sir Benjamin Middlethwaite