Why is the outfeed table on a jointer adjustable?
John Brock: So it can be set to the height of the cutters and eliminate snipe.
Richard Jones: To make fine adjustments so as to get the surface of that table tangent to the cutting circle described by the cutters in the cutter block.
Carol Reed: As you sharpen cutters you will find that you may need to adjust the outfeed table to align with them.