Hello. Newbie to the forum and to woodworking. I purchased a Jointer (6") and I am running 23 inch long oak pieces through it. From what I can tell, the machine is set up correctly (I checked it with squares) but when I run the wood through it, my results are bad. I want to get a straight edge so I can glue up the oak to make a panel so I take the side that has a arch (low on the ends and high in the middle) or is fairly straight already and run it through. What I end up with is a bow, Low on the ends and high in the middle. For the life of me, I can't figure it out. Does anyone have any tips or a reason why this is happening to me? Being new to the machine, I have not ruled out operator error. Thanks