I've been making edge grain cutting boards recently.
My process:
1) Face joint the board on a jointer
2) edge Joint one edge on jointer
3) Use planer to joint the other face of the board
4) Rip strips on the table saw using jointed edge against the table saw fence
I've noticed that even with this basic process, after I rip the strips, there are still sometimes small places along the board where I'll get a gap during glue up. With edge grain cutting boards, I'm gluing the face side of the board strips to one another and it suggests that the board face is flat but then once I rip it into strips, it's not?
I wonder if when I rip the boards stress in the wood is release and they sometimes might bow slightly? I've started taking the ripped pieces back to the jointer and running them again to try and completely flatten the face of the strips for the glue up, but I wonder if there's something I'm doing wrong.
Any suggestions welcome and I love this forum!