"Connor Aston" wrote in message
...

I have made up a tabletop from planned 1 1/2" maple . The top is made
from 4 x boards each about 9" wide. I used Titbeond III to glue each edge
(there was plenty of glue) and spread out along the joint with a brush.
The problem is after it has been sanded (by a friend of mine on his pad
sander) at one end the joints have opened up by about a 1/16" running
down for about 4". I can't really see why this has happened?
My only guess is that the heat of the sanding has sucked a lot of
moisture from the Maple? And if the timber has shrunk by sanding it do you
think it will shrink anymore. I intend to cut the ends and use without a
breadboard for a more contemporary look.Has anyone else ever had this
happen. Each rough sawn board had at least
4" cut from each end before planning and glueing up.

Rather than cut the ends off, unless you planned to any way, simply rip down
the glue joint and reglue.