I am in need of some serious help with my jointer. For the life of me I can not seem to get a board to come out straight. I'm not sure if it's my technique or if it is the setup of the jointer. Yesterday I had a board that was 19" long that was slightly convex on the edge that I needed to be straight. After making a couple of passes across the jointer, the edge of the board was worse than when I started. I turned the board around and made two more passes at which point I determined if I kept going I was going to end up with a "V" shaped board. I can take a 2' board that is straight except for the last two inches, and by the time I'm done, it will only be straight for the first 12 inches.
Tonight I took a 14" machinist square and tried to verified that the infeed table was parallel with the outfeed table. It is as best I can tell. I took another board that was slightly convex and made a series of passes marking the edge with a pencil before each pass so I could see exactly where material was being removed. It appears that with each pass I remove less and less material. On the first pass I might get a cut on 90% of the edge, on the second 75%, etc... The fourth pass thru will only cut from the leading edge to the middle of the board.
Any help to 'straighten' out this mess would be appreciated.
Mark