"Leuf" wrote in message
...

The practice I have seen on woodworking tv shows goes like joint one
edge, rip on TS 1/32" oversize, then go back to the jointer to take
that 1/32" off. If the jointer isn't introducing a taper then they
should still be parallel.

I have seen that too. I have also seen the shows use a guard when cutting
dado's on the TS. Because it is on TV does in mean it is right. My shop
teacher would give licks to any one that used the jointer on opposite sides
of a board. The TV shows that use a jointer after the TS are using the
jointer incorrectly and are not using a properly set up TS. I would not
dream of depending on a jointer to bring a board to an exact edge or
thickness. If the jointer was intended to make surfaces parallel it would
have a gauge like all other tools intended to make surfaces parallel.