I am a relatively skilled craftsman, however, I have just recently been using a table saw. Why, when cutting a length of birch plywood, does my saw "bind" and try to throw the piece of wood back to me. For example: I have a 4 x 2 piece of plywood and I am cutting it down to 4 x 18". I set my fence so that the work piece (6") is riding on the fence. Not only does my table saw bind, but I find my cut to not be uniform the entire length of the wood. I am using an extremely old table saw (formerly my father-in-laws) and I do have a new blade on it. Any help would be greatly appreciated.