I have a Jet jointer/planer, and have had a hard time getting a true edge joint. I consistently get a crown in the joint, more material is being removed from the center of a board than the ends. Seems to be something like a 32nd in 60 inches pretty consistently.

I have checked and rechecked and fiddled and reset the infeed table and have it to within 3 thou front to back and side to side. Any more fiddling and I get it worse, not better. I surmise that is plenty acceptable, so I must be the problem.

Does anyone have any idea what I am doing wrong? I feed the stock into the cutter smoothly with pressure on the infeed table, and after about half the board moves through the cutterhead I shift pressure to the outfeed side.

Thanks