No, I'm not writing about eating too much for breakfast, so save those jokes. I just put together a 2 shelf bookshelf carcass with 45* miter corners. I put 3 biscuits per corner for a total of 24 slots cut. I dry fit the carcass and had to use clamps to get the corners to fit together properly. Some biscuits had to be hammered in, some wouldn't stay in the slot. I blame an inconsistency in the biscuit thickness; a few .000 can make the difference. After the first corner I plunged the cutter into each slot 3 times to make sure the slots were cleared, but it didn't make a difference. After dry fit some biscuits had ridges forced into them by the harder maple shelf wood pushing the softer fibers of the beech biscuits, which I sanded down before reinserting and glueing.
Previously I learned the hard way about putting wood glue on the biscuits at glue up. The biscuits immediately absorb the water in the glue, swell up, and become impossible to press down all the way into the slots. How tightly should the biscuits fit into the cut slots? Short of pre-sanding every biscuit to thin them down, what is a solution for getting a light-touch press fit?
Previously I learned the hard way about putting wood glue on the biscuits at glue up. The biscuits immediately absorb the water in the glue, swell up, and become impossible to press down all the way into the slots. How tightly should the biscuits fit into the cut slots? Short of pre-sanding every biscuit to thin them down, what is a solution for getting a light-touch press fit?