Technically you need a jointer to smooth the edge and one surface. You make
the opposite edge parallel to the jointed edge with you TS. You make the
opposite surface that you made smooth with the jointer smooth and parallel
with the thickness planer.

That said, I have successfully done what you propose with "flat" rough
stock and only a planer for the top and bottom surfaces.



wrote in message
oups.com...
I am buying alot of quartersawn white oak in the rough and I had a
question. I need to mill it in my Delta 12" planner but since both the
top and bottom are rough is there a proper way to ensure I have a flat
board when I finish milling it. The lumber does not have a smooth
surface on the bottom when I first put it into the planer but I want to
make sure that it remains flat as I mill it so when it it flipped over
to do the other side the board is flat or does it matter.
Thanks,
Mike