Originally Posted by
Eric Schmid
If you are confident in your alignment measurements, blade and cutting technique, something may be causing your blade to deflect in the cut. When the board is at the end of the cut the tension releases, returning the blade back to 90.
Deflection could be caused by a bad arbor bearing or warped flanges, tough wood, thin kerf blade, dull blade, etc.
What happens if you cut down the middle of a larger piece? Do you have a full kerf blade to try?
I keep my fences kicked out a little on the outfeed side. Cuts turn out just fine and no backside blade nicks.