The best way to align a table saw is first of all to make sure the blade is absolutely parallel to the mitre slots. Most table saws will have adjustment screws or assemblies, what is critical is aligning them accurately with the mitre slots. This may require a special too like the Table Saw Gauge , or you can make your own with something that will attach to your mitre gauge with some sort of adjusting screw or other fine measuring device to butt up against the side of the blade, front and back to check for it's parallel.
The reason we want the saw blade aligned with the mitre gauge is that it then become easier to align the mitre gauge and fence with the mitre slots, which always remain constant.
Re-aligning your table saw will give you a whole new outlook on woodworking. There is nothing better than hearing wood clearing the blade cleanly, and you will know when this happens ... you can actually hear the wood being cut cleanly !!!
Copyright Colin Knecht