I just wanted to throw this out in case it could help someone else.
I have an old Belsaw planer that my grandfather gave to me. It has seen a lot of use over it's 30+ years of service for him.
I used it and not too much trouble with it being well used and warn, but recently, especially with the Jatoba cabinets I'm building, I was getting a lot of snipe at the front of the board and the end of the board.
I shimmed the outfeed and infeed tables and if anything it got worse. I then stepped back, put my hammer down,, and started to really look at things.
I found that what was happening was the bed was tilting with the weight of the wood(even with secondary supports for the wood). So the bed would tilt down on the infeed raising the front of the board into the cutter head. Then once the 2nd roller caught the board it would push the bed into alignment, but as the wood cleared the infeed roller, the bed would tip down on the outfeed side, again raising the wood into the cutter head.
There are 4 bushings that support the bed rising rods and I shimmed these and problem solved. I now have NO snipe what so ever.
So, if your planer is having troubles, watch the bed and see if there is any movement in it with the wood only under one roller. My planer would only tilt up and down maybe .10 of an inch, but at the cutter head it was huge.
So, hope this helps someone!
And, yep, once this project is over I will be ordering new parts for my planer!