"Stoutman" .@. wrote in message

If you start with parallel faces you should end up with parallel faces.

Not necessarily the case at all, either with edges, or faces. AAMOF, it you
happen to have done so, just consider yourself lucky ... this time.

If the board has any edge or face bow the faces/edges can still be
"parallel" ... joint one of those faces/edges and you will absolutely NO
longer have parallel faces/edges.

Then try to joint the opposite face/edge and you will be chasing your tail
with "taper" on one or both ends ... guaranteed.

As Leon correctly stated, a jointer simply should not be used in an attempt
to make opposite faces/edges "parallel".

These results can only be guaranteed with, and are jobs for the well setup
thickness planer and table saw for the normite, respectively, or the
appropriate planes for the neander.

If you do NOT follow this truism, it will eventually bite you in the butt
.... guaranteed.

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Last update: 2/07/07